NEET PG obstetrics & gynaecology questions

Naegele's rule estimates the expected date of delivery by adding 7 days to the first day of the last menstrual period and subtracting 3 months (or adding 9 months), assuming a 28-day cycle. For an LMP of 10 May: add 7 days = 17 May, then subtract 3 months = 17 February. This rule assumes ovulation on day 14 of a 28-day cycle, so it is adjusted for longer or shorter cycles accordingly.

• B. This date corresponds to subtracting 4 months instead of 3, an arithmetic error.
• C. This matches the LMP date itself with month adjustment but omits the +7 day correction.
• D. Incorrect day calculation; adding 7 days to 10 May gives 17, not 15, before subtracting 3 months.

The diagonal conjugate is measured clinically from the lower border of the symphysis pubis to the sacral promontory. The obstetric (true) conjugate, which represents the shortest anteroposterior diameter of the pelvic inlet, is estimated by subtracting 1.5 to 2 cm from the diagonal conjugate, accounting for the thickness and slope of the symphysis pubis. A diagonal conjugate of 12.5 cm therefore corresponds to a true conjugate of approximately 11 cm, which should be at least 10 cm for an adequate pelvic inlet.

• A. This equates the true conjugate to the diagonal conjugate directly, ignoring the standard subtraction for symphyseal thickness.
• C. This represents the minimum acceptable true conjugate value, not the calculated value from this specific diagonal conjugate measurement.
• D. This value is higher than the diagonal conjugate itself, which is not physiologically possible since the true conjugate is always shorter.

The first-trimester combined test integrates maternal age, nuchal translucency on ultrasound, and serum pregnancy-associated plasma protein-A (PAPP-A) and free beta-hCG, performed between 11 weeks and 13 weeks 6 days of gestation, the window in which nuchal translucency measurement is both technically reliable and most discriminatory for trisomy 21 and other aneuploidies. This combined test achieves a detection rate of about 90-95% for trisomy 21 with a lower false-positive rate than second-trimester serum screening alone. The triple and quadruple marker tests are second-trimester serum screens with lower sensitivity when used in isolation, and nuchal translucency loses its interpretability as a sonographic marker after about 14 weeks because nuchal edema normally resolves.

• A. The quadruple marker test is also performed in the second trimester and has a lower detection efficiency than the combined test.
• C. The triple marker test is a second-trimester screen with a higher false-positive rate than the first-trimester combined test.
• D. Nuchal translucency alone, without serum markers, has a lower detection rate and loses measurement reliability after 14 weeks.

The Government of India's maternal health programme recommends that every pregnant woman receive one tablet containing 60 mg of elemental iron and 500 micrograms of folic acid daily, starting after the first trimester, for a minimum of 180 days continued into the postpartum period. This is given along with calcium and vitamin D supplementation (500 mg elemental calcium twice daily) from the fourth month of pregnancy for 180 days, to prevent maternal anemia and support fetal growth. The 180-day duration ensures adequate cumulative iron stores given the limited absorption and compliance issues commonly seen in supplementation programmes.

• B. This dose and duration do not match the national protocol, which specifies 60 mg iron for 180 days, not 100 mg for 100 days.
• C. The iron dose of 30 mg is lower than the recommended 60 mg elemental iron per tablet under the national programme.
• D. The folic acid dose of 400 micrograms and duration of 90 days are lower than the recommended 500 micrograms for 180 days.

The partogram alert line represents the expected rate of cervical dilatation (1 cm/hour) from the onset of active labour; crossing it signals slow progress requiring closer monitoring. The action line, drawn 4 hours to the right of the alert line, indicates that active intervention is needed when crossed, since prolonged labour increases risks of obstructed labour, uterine rupture, and fetal distress. Reaching the action line mandates a full reassessment, including pelvic adequacy, contraction pattern, and fetal condition, to decide between augmentation with oxytocin or caesarean delivery. Routine observation or discharge would delay necessary intervention, while proceeding straight to caesarean without assessment skips essential clinical evaluation.

• A. Caesarean section should not be performed without first assessing the cause of delay, such as cephalopelvic disproportion or inadequate contractions.
• B. The patient is in active labour with abnormal progress and cannot be discharged.
• D. Crossing the action line indicates a need for active intervention, not continued routine observation.

Before each repeat dose of magnesium sulfate in the Pritchard regimen, three clinical parameters must be checked to avoid toxicity: presence of the patellar (knee-jerk) reflex, respiratory rate above 12 breaths per minute, and urine output of at least 25-30 mL per hour (or 100 mL in 4 hours). Loss of deep tendon reflexes is the earliest sign of magnesium toxicity, followed by respiratory depression and then cardiac arrest at progressively higher serum magnesium levels, so these clinical signs serve as a bedside surrogate for serum levels when magnesium assays are not readily available. Adequate urine output ensures magnesium, which is renally excreted, does not accumulate to toxic levels. Routine serum magnesium or calcium measurement and continuous fetal monitoring are not part of the standard bedside safety checks for this regimen.

• B. A serum magnesium level this high indicates toxicity and would be a reason to withhold, not give, the next dose.
• C. Serum calcium is not part of the standard bedside monitoring protocol before each magnesium dose.
• D. Continuous fetal monitoring, while often done in severe preeclampsia, is not a specific safety check for magnesium sulfate toxicity.

Magnesium sulfate toxicity, manifesting as loss of deep tendon reflexes followed by respiratory depression, is treated with 10 mL of 10% calcium gluconate given intravenously over 3 to 5 minutes. Calcium competes with magnesium at the neuromuscular junction, directly antagonizing its effect and promptly reversing neuromuscular blockade and respiratory depression. Supportive measures such as oxygen administration and assisted ventilation may also be required, but calcium gluconate is the specific pharmacologic antidote. Naloxone and flumazenil reverse opioid and benzodiazepine toxicity respectively, and sodium bicarbonate has no role in magnesium toxicity.

• A. Naloxone reverses opioid-induced respiratory depression, not magnesium toxicity.
• C. Flumazenil reverses benzodiazepine toxicity, not magnesium toxicity.
• D. Sodium bicarbonate is used for metabolic acidosis or certain drug toxicities, not for magnesium sulfate toxicity.

Acute-onset severe hypertension in pregnancy (systolic ≥160 mmHg or diastolic ≥110 mmHg, confirmed within 15 minutes) is a hypertensive emergency requiring prompt treatment to prevent maternal stroke and other end-organ damage. Intravenous labetalol, a combined alpha- and beta-blocker, is a first-line agent along with intravenous hydralazine and oral immediate-release nifedipine, since it lowers blood pressure effectively and rapidly without compromising uteroplacental perfusion when dosed appropriately. Atenolol is avoided in pregnancy due to its association with fetal growth restriction, and it is not used for acute blood pressure emergencies due to its oral route and slower onset. Sodium nitroprusside is avoided because of the risk of fetal cyanide toxicity, and oral nifedipine, while an acceptable alternative, is not the only option and parenteral agents are preferred first-line choices when available.

• A. Atenolol is associated with fetal growth restriction and is unsuitable for acute blood pressure emergencies due to its oral route.
• C. Sodium nitroprusside carries a risk of fetal cyanide toxicity and is avoided in pregnancy.
• D. Oral nifedipine is an acceptable alternative but labetalol or hydralazine given intravenously are preferred first-line options, and this option incorrectly excludes them.

HELLP syndrome, a severe variant of preeclampsia, is characterized by the triad of hemolysis (evidenced by schistocytes on peripheral smear, elevated lactate dehydrogenase, and low haptoglobin), elevated liver enzymes, and low platelet count (thrombocytopenia), as seen in this patient. It typically presents with right upper quadrant or epigastric pain due to hepatic involvement and occurs in the setting of hypertensive disease of pregnancy. Disseminated intravascular coagulation would also show prolonged coagulation times and low fibrinogen, which are not described here, and acute fatty liver of pregnancy typically presents with hypoglycemia, coagulopathy, and markedly elevated bilirubin without the characteristic hemolytic picture. Thrombotic thrombocytopenic purpura shows severe thrombocytopenia and hemolysis but is not specifically associated with liver enzyme elevation or pregnancy-induced hypertension in this pattern.

• A. Acute fatty liver of pregnancy classically presents with hypoglycemia, coagulopathy, and marked hyperbilirubinemia rather than this hemolysis-liver enzyme-thrombocytopenia pattern.
• B. DIC typically shows prolonged PT/aPTT and low fibrinogen, which are not mentioned in this case.
• D. TTP causes hemolysis and thrombocytopenia but is not linked to preeclampsia or marked liver enzyme elevation.

The immediate priority after an eclamptic seizure is maternal stabilization: positioning the woman in the left lateral position to prevent aspiration and aortocaval compression, ensuring a patent airway, and administering supplemental oxygen, followed promptly by magnesium sulfate to prevent recurrent seizures. Delivery is not immediately emergent once the mother is stabilized and the seizure has resolved; it is planned after stabilization, usually within a few hours, based on fetal and maternal status rather than as an immediate reflex response to the seizure itself. Diazepam is not first-line for seizure prophylaxis or recurrence in eclampsia since magnesium sulfate has been shown to be superior. Neuroimaging is reserved for atypical presentations, focal neurological deficits, or seizures unresponsive to magnesium sulfate, not as an immediate step in a typical eclamptic seizure.

• A. Magnesium sulfate, not diazepam, is the drug of choice for seizure control and prophylaxis in eclampsia.
• B. Neuroimaging is not an immediate priority in a typical eclamptic seizure and should not delay maternal stabilization.
• C. Caesarean section is not the immediate priority; maternal stabilization comes first and delivery timing is decided afterward.

Low-dose aspirin (75-150 mg/day) reduces the risk of pre-eclampsia in women with high-risk factors (prior pre-eclampsia, chronic hypertension, obesity, multifetal gestation) by improving trophoblastic invasion and placentation. Benefit is maximal when started before 16 weeks of gestation, as this is the window during which spiral artery remodelling occurs. Starting after 16 weeks significantly reduces efficacy since placentation is already established. It is usually continued until 36-37 weeks of gestation.

• A. Starting this late provides minimal benefit as the pathological process of defective placentation has already occurred.
• B. This is far too late; aspirin is ineffective at preventing pre-eclampsia if started near term.
• C. Placentation is largely complete by this time, reducing the drug's protective effect on spiral artery remodelling.

Placenta previa classically presents with painless, bright red vaginal bleeding, a soft non-tender uterus, and a high-floating or malpresenting fetal part because the lower-lying placenta prevents the head from engaging. Abruptio placentae typically causes painful bleeding with a tender, tetanic or woody-hard uterus and often fetal distress. The absence of pain and uterine tenderness, combined with a high presenting part, favours previa over abruption. Fetal heart sounds are usually well preserved in previa unless bleeding is massive.

• B. Abruption typically presents with painful bleeding and a tender, hard uterus, which is absent here.
• C. Vasa previa presents with painless bleeding after rupture of membranes and acute fetal distress, not a soft non-tender uterus with a normal fetal heart rate.
• D. Uterine rupture occurs during labour with severe abdominal pain, scar tenderness, and loss of fetal station, not in a quiescent uterus before labour.

Transvaginal ultrasonography is the most accurate method for localizing the placenta and measuring the distance from the internal cervical os, with better resolution than the transabdominal route because the probe is closer to the lower uterine segment. It is safe in placenta previa because the probe is positioned in the vagina at an angle that avoids direct contact with the os, and it does not provoke bleeding. Transabdominal ultrasound is used as the initial screening test but has higher false-positive and false-negative rates due to bladder filling artifacts and fetal head shadowing. MRI is reserved for suspected placenta accreta spectrum, not routine localization.

• B. MRI is reserved for evaluating suspected placenta accreta spectrum invasion, not for routine localization of previa.
• C. This is the initial screening method but is less accurate than the transvaginal route for precise os-to-placenta distance measurement.
• D. Doppler of the uterine arteries assesses blood flow and is used in pre-eclampsia risk assessment, not for placental localization.

In any case of antepartum haemorrhage of undetermined cause, digital per-vaginal examination is contraindicated until placenta previa has been excluded by ultrasonography, because it can disrupt the placental edge over the cervical os and provoke torrential haemorrhage. This is the classic 'no touch' rule in antepartum haemorrhage. A gentle speculum examination may be done cautiously to visualize local causes of bleeding, but digital examination must wait for imaging confirmation. Once previa is excluded, digital examination can be safely performed.

• A. The timing of cessation of bleeding does not make digital examination safe; ultrasound exclusion of previa is mandatory first.
• B. Even preceding it with a speculum examination does not make digital examination safe before previa is excluded.
• D. Digital examination before excluding previa risks dislodging the placenta and causing severe haemorrhage.

Couvelaire uterus, also called uteroplacental apoplexy, occurs in severe cases of abruptio placentae when retroplacental blood infiltrates the myometrium and extends beneath the serosa and sometimes into the broad ligaments and peritoneal cavity, giving the uterus a bruised, bluish-purple discoloration. This results from extensive extravasation of blood under high pressure through the myometrial fibers. Despite the alarming appearance, it is usually not an indication for hysterectomy by itself, as the uterus retains contractility in most cases. The condition is a marker of severe abruption and increases the risk of coagulopathy and postpartum haemorrhage.

• B. Uterine rupture presents with a palpable defect and loss of fetal station, not diffuse myometrial infiltration by blood from abruption.
• C. Scar thinning relates to risk of rupture at a prior caesarean site, not the bruised appearance caused by retroplacental bleeding.
• D. Ascending infection causes endomyometritis with different findings such as foul-smelling discharge and fever, not diffuse bluish bruising from abruption.

Vasa previa occurs when fetal vessels, unsupported by placental tissue or umbilical cord, run through the membranes over the internal cervical os, as can happen with velamentous cord insertion or a succenturiate/bilobed placenta. Rupture of membranes can tear these vessels, causing fetal bleeding that presents as bright red vaginal bleeding immediately after amniotomy or spontaneous rupture, with a sinusoidal fetal heart rate pattern and rapid fetal deterioration due to exsanguination. It is a true obstetric emergency requiring immediate caesarean delivery. Risk factors include IVF pregnancies, bilobed or succenturiate placenta, and velamentous cord insertion.

• A. Abruption causes painful bleeding with uterine tenderness, not bleeding precisely coincident with membrane rupture and a sinusoidal trace.
• B. Marginal previa bleeding is maternal in origin and does not typically cause a sinusoidal fetal heart pattern immediately after rupture of membranes.
• C. Uterine rupture presents with maternal shock, loss of fetal station, and severe abdominal pain, not bleeding timed to membrane rupture with fetal exsanguination.

The described findings, failure of shoulders to deliver with gentle traction and retraction of the head against the perineum (turtle sign), are classic for shoulder dystocia caused by impaction of the anterior shoulder behind the pubic symphysis. The first-line maneuver is the McRoberts maneuver, which involves hyperflexion and abduction of the maternal hips to straighten the sacrum relative to the lumbar spine and rotate the symphysis pubis superiorly, combined with suprapubic pressure to dislodge the anterior shoulder. It is simple, rapid, and successful in the majority of cases without requiring internal manipulation. Fundal pressure is contraindicated as it can worsen impaction and increase the risk of uterine rupture or brachial plexus injury.

• A. Symphysiotomy is an extreme, rarely used measure reserved for resource-limited settings when standard maneuvers fail.
• C. Fundal pressure can worsen shoulder impaction and increase the risk of uterine rupture and brachial plexus injury; it should be avoided.
• D. Zavanelli maneuver, cephalic replacement with caesarean delivery, is reserved for cases where all other maneuvers fail.

Umbilical cord prolapse with a non-reassuring fetal heart rate and an undilated or incompletely dilated cervix mandates immediate delivery, almost always by emergency caesarean section. Until the operating room is ready, the examiner's hand should remain in the vagina to elevate the presenting part off the cord, relieving compression and preserving fetal circulation. The knee-chest or exaggerated Sims position and tocolysis can be used as adjuncts but do not replace this manoeuvre. Pushing the cord back in is not recommended as it does not reliably relieve compression and delays delivery.

• B. Membranes are already ruptured; this step is irrelevant and delays definitive management.
• C. Manual replacement of the cord into the uterus is not recommended practice and does not reliably prevent compression.
• D. Oxytocin would worsen cord compression by increasing uterine contractions and is contraindicated here.

Active management of the third stage of labour (AMTSL) comprises three components: administration of a prophylactic uterotonic (oxytocin 10 IU IM/IV is first-line) within one minute of birth, controlled cord traction with simultaneous counter-traction on the uterus (guarding) to deliver the placenta, and uterine massage after placental expulsion to maintain tone. This bundle reduces the risk of postpartum haemorrhage compared with expectant management. Cord clamping timing is addressed separately and is now recommended to be delayed by 1-3 minutes in uncomplicated deliveries, not tied to the uterotonic timing.

• B. This omits the prophylactic uterotonic given promptly after delivery, which is the most critical component for preventing PPH.
• C. Giving a uterotonic only after bleeding starts is reactive management, not the active prophylactic approach.
• D. Early cord clamping is no longer recommended as part of AMTSL in uncomplicated deliveries, and massage should begin after placental delivery, not as a timed schedule.

Methylergometrine (an ergot alkaloid) causes generalized vasoconstriction and can precipitate a severe hypertensive crisis, seizures, or stroke, so it is contraindicated in patients with hypertension, pre-eclampsia, or eclampsia. Oxytocin is safe and is the first-line uterotonic regardless of blood pressure status. Carboprost should be used cautiously but is not primarily contraindicated for hypertension; its major caution is bronchospasm in asthmatics. Misoprostol has no significant hypertensive effect and can be safely used in hypertensive patients.

• A. Carboprost's main contraindication is asthma/bronchospasm, not hypertension.
• B. Oxytocin has minimal pressor effect at therapeutic doses and is safe in hypertensive patients.
• D. Misoprostol does not cause significant vasoconstriction and is safe to use in hypertensive patients.

Amniotic fluid embolism classically occurs during labour, delivery, or shortly postpartum and presents with the sudden triad of acute hypoxia, cardiovascular collapse (hypotension/cardiac arrest), and coagulopathy (disseminated intravascular coagulation), often preceded by a seizure. It results from entry of amniotic fluid and fetal debris into maternal circulation, triggering an anaphylactoid-type reaction with pulmonary vasospasm and activation of the coagulation cascade. The abrupt onset during active labour without preceding fever or trauma, combined with DIC, points away from thromboembolism, HELLP, or sepsis. Diagnosis is clinical, as no confirmatory laboratory test is used in practice.

• A. Septic shock requires an infectious source and typically has a more gradual onset with fever, which is absent here.
• B. HELLP and eclampsia evolve with preceding hypertension and proteinuria, not sudden intrapartum collapse without prior warning signs.
• D. Pulmonary thromboembolism does not typically cause this rapid triad with DIC and is less commonly associated with intrapartum seizures.

The Bishop score evaluates five parameters: dilatation, effacement, station, consistency, and position of the cervix, each scored 0-3 (station and the others scored 0-2 or 0-3 depending on the version). A dilatation of 2 cm scores only 1 point out of a maximum of 3, the lowest relative contribution here, since 0 cm scores 0, 1-2 cm scores 1, 3-4 cm scores 2, and ≥5 cm scores 3. In contrast, 60% effacement, medium consistency, and a station of -1 each fall into mid-range or favourable categories on the standard scoring table. A total Bishop score below 6 is generally considered unfavourable, warranting cervical ripening before oxytocin induction.

• A. 60% effacement scores favourably in the mid-range of the effacement scale.
• B. Medium consistency scores a middle value, not the lowest.
• D. A station of -1 scores favourably on the standard Bishop scoring table compared to higher stations like -3.

Central (type IV/major) placenta praevia, where the placenta completely covers the internal cervical os, is an absolute indication for caesarean section because vaginal delivery is mechanically impossible without catastrophic haemorrhage. Absolute indications are those where vaginal delivery cannot occur safely under any circumstance, such as central placenta praevia, cephalopelvic disproportion with a contracted pelvis, and certain cases of pelvic obstruction. Breech presentation, a trial of labour after previous caesarean, and fetal distress are relative indications, meaning caesarean is often preferred but vaginal delivery may be feasible depending on the clinical context and facilities.

• A. Breech presentation is a relative indication; vaginal breech delivery can be attempted in selected cases with favourable criteria.
• C. A previous single lower segment caesarean section with a well-formed lower segment is a relative indication; trial of labour after caesarean can be offered.
• D. Non-reassuring fetal heart rate is a relative indication requiring individualized assessment and may sometimes allow expedited vaginal delivery.

After evacuation of a hydatidiform mole, serial serum beta-hCG monitoring is the standard method to detect persistent trophoblastic disease or choriocarcinoma, since hCG is produced by trophoblastic tissue and its trend reflects disease activity. Weekly levels are checked until three consecutive values are normal, followed by monthly levels for six months, during which effective contraception is advised to avoid confusion with a new pregnancy. A plateau or rise in titres indicates persistent gestational trophoblastic disease requiring further evaluation and chemotherapy. Imaging has a role in staging once GTN is diagnosed but is not the primary surveillance tool.

• A. Hysterectomy is not indicated for routine follow-up and is reserved for selected cases with family completed and no desire for fertility.
• B. Chest X-ray is used for metastatic workup only if GTN is diagnosed, not as routine periodic surveillance.
• D. Ultrasound does not reliably detect microscopic persistent trophoblastic disease and is not the recommended surveillance method.

The LH surge, triggered by rising estradiol from the dominant follicle exerting positive feedback on the hypothalamic-pituitary axis, causes resumption of meiosis in the oocyte, luteinization of granulosa cells, and follicular rupture roughly 36 hours later. FSH supports early follicular growth and selection of the dominant follicle but does not trigger ovulation itself. Estradiol rises progressively in the follicular phase and is the signal that induces the LH surge rather than the direct trigger for rupture. Progesterone rises only after ovulation as the corpus luteum forms, supporting the luteal phase endometrium.

• A. Estradiol induces the LH surge via positive feedback but does not itself cause follicular rupture.
• C. Progesterone rises after ovulation from the corpus luteum and does not trigger oocyte release.
• D. FSH drives follicular recruitment and growth but is not the direct trigger for ovulation.

A discrete, well-defined intramural mass distorting the cavity on ultrasound, with a bulky uterus and normal endometrium on biopsy, is characteristic of a submucosal or intramural leiomyoma, which is the 'L' in the PALM-COEIN classification. Leiomyomas cause heavy bleeding by increasing endometrial surface area, impairing myometrial contractility, and disrupting local vasculature. Adenomyosis typically shows a diffusely enlarged uterus with a heterogeneous, poorly marginated myometrium rather than a discrete mass. A polyp would appear as a focal echogenic lesion within the cavity itself, and coagulopathy would not produce a structural uterine mass.

• A. Adenomyosis presents with diffuse myometrial thickening and a globally bulky uterus, not a discrete well-defined mass.
• B. An endometrial polyp is a focal intracavitary lesion arising from endometrium, not an intramural mass distorting the cavity.
• D. Coagulopathy is a systemic cause of AUB and does not produce a structural uterine mass on imaging.

Combined oral contraceptives primarily act by suppressing hypothalamic GnRH pulsatility and blunting the pituitary LH surge, thereby preventing ovulation, which is the main contraceptive mechanism. The estrogen component suppresses FSH and prevents dominant follicle selection, while the progestin component suppresses LH and blocks the surge required for ovulation. Secondary mechanisms include thickening of cervical mucus and production of an atrophic endometrium, but these are supportive rather than primary. Tubal motility changes are not a significant contraceptive mechanism of combined pills.

• A. Combined pills do not significantly act through altered tubal motility.
• C. Cervical mucus thickening is a secondary contraceptive mechanism, more prominent with progestin-only methods, not the primary action of combined pills.
• D. Endometrial changes are a backup mechanism that would only matter if ovulation and fertilization occurred, not the primary mode of action.

A personal history of venous thromboembolism is an absolute (WHO category 4) contraindication to combined oral contraceptives, because the estrogen component increases hepatic synthesis of clotting factors and raises the risk of recurrent VTE. Age over 35 alone is not an absolute contraindication unless combined with other risk factors such as smoking or migraine with aura. Nulliparity has no bearing on COC safety. A family history of breast cancer in a distant relative is not an absolute contraindication; only a strong personal or first-degree history with known BRCA mutation raises specific concern, and even then guidelines do not universally prohibit COC use.

• A. Nulliparity is not related to thrombotic or hormonal risk from combined pills.
• B. Age alone is not an absolute contraindication; it becomes significant only with additional risk factors like smoking.
• D. A distant family history of breast cancer is not an absolute contraindication to combined oral contraceptives.

The copper IUD can be inserted within 10 minutes of placental delivery (postplacental insertion), within 48 hours postpartum, or delayed beyond 4 weeks; the 48-hour-to-4-week window is avoided due to higher expulsion rates. Its primary contraceptive mechanism is a copper ion-induced sterile inflammatory reaction in the endometrium that is toxic to sperm, impairs sperm motility and survival, and prevents fertilization, with some effect on the ovum as well. It does not suppress ovulation, and ovulatory cycles continue normally. Cervical mucus thickening is the mechanism of progestin-only methods, not the copper IUD.

• A. The copper IUD does not cause endometrial atrophy; that effect is characteristic of hormonal implants and intrauterine systems.
• B. Postplacental insertion within 10 minutes is permitted and does not require waiting until 6 weeks; the copper IUD also does not suppress ovulation.
• D. Cervical mucus thickening is the mechanism of progestin-based contraceptives, not the copper IUD.

Clomiphene citrate is a selective estrogen receptor modulator that binds estrogen receptors in the hypothalamus and blocks negative feedback, leading to increased GnRH pulsatility and FSH/LH release, which stimulates follicular development. Although letrozole (an aromatase inhibitor) is now preferred by many guidelines for live birth rates in PCOS, clomiphene's classical mechanism of action is receptor blockade at the hypothalamus, which is the specific pharmacological point being tested here. Metformin improves insulin sensitivity but is not a direct ovulation inducer. Gonadotropins act directly on the ovary and are reserved for clomiphene/letrozole-resistant cases.

• A. Metformin improves insulin resistance and indirectly restores ovulation but does not act on hypothalamic estrogen receptors.
• B. Letrozole acts by inhibiting aromatase, reducing peripheral estrogen synthesis, not by blocking estrogen receptors.
• C. Gonadotropins directly stimulate ovarian follicles and are used in resistant cases, not as first-line agents.

Hysterosalpingography (HSG) is the standard screening test for tubal patency in infertility workup, performed in the early proliferative phase to avoid disrupting an early pregnancy. Distal tubal occlusion with dilatation of the tube and absence of peritoneal spillage is the classic HSG appearance of hydrosalpinx, often due to prior pelvic inflammatory disease or chlamydial infection. Cornual block would show contrast failing to enter the proximal tube at the uterotubal junction, without the ballooned distal segment. Uterine anomalies like septate or bicornuate uterus are diagnosed from the shape of the uterine cavity itself, not tubal filling defects.

• A. Cornual block shows non-filling of the tube near the uterotubal junction, without distal tubal dilatation.
• B. A bicornuate uterus shows two separate divergent uterine horns, unrelated to tubal spillage.
• C. A uterine septum appears as a midline indentation dividing the uterine cavity, not as tubal ballooning.

HPV 16 and 18 are the high-risk oncogenic genotypes responsible for about 70% of cervical cancers globally, acting through viral E6 and E7 oncoproteins that inactivate p53 and Rb tumor suppressor proteins respectively. The quadrivalent HPV vaccine covers types 16 and 18 for cancer prevention along with low-risk types 6 and 11, which cause anogenital warts but are not oncogenic. HPV 31, 33, 45, and 52 are additional high-risk types covered by the nonavalent vaccine but account for a smaller proportion of cases than 16 and 18.

• A. HPV 31 and 33 are oncogenic but contribute to a smaller fraction of cervical cancers than 16 and 18.
• C. HPV 6 and 11 are low-risk types causing genital warts, not major oncogenic drivers.
• D. HPV 45 and 52 are included in the nonavalent vaccine but are not the predominant types causing cervical cancer.

The FIGO 2018 staging system for carcinoma cervix is unique in that it now allows incorporation of imaging (CT, MRI, PET) and pathological findings, such as lymph node status, in addition to clinical examination, unlike the older purely clinical staging. This revision allows nodal involvement to upstage disease to stage IIIC. It remains primarily a clinical staging system at its core but is supplemented by imaging and pathology when available, rather than being purely surgical or based on tumor grade alone. This distinguishes cervical cancer staging from endometrial and ovarian cancer, which are surgically staged.

• B. Cervical cancer staging is not purely surgical; it is fundamentally clinical with optional imaging/pathology input.
• C. Histopathological grade alone does not determine FIGO stage; stage depends on tumor extent and spread.
• D. Tumor markers are not part of FIGO staging criteria for cervical cancer.

The Government of India's national programme for prevention and control of cancer recommends visual inspection with acetic acid (VIA) as the preferred screening method at the primary health centre level for women aged 30-65 years, as it is low-cost, requires minimal infrastructure, and gives immediate results allowing same-visit management (screen-and-treat approach). Pap smear requires cytology laboratory support and trained cytopathologists, which are often unavailable in rural primary care settings. HPV DNA testing, while more sensitive, is costlier and not yet universally deployed at the primary care level in the national programme. Colposcopy is a diagnostic, not a screening, tool used after a positive screening test.

• A. Colposcopy is a diagnostic procedure used to evaluate a positive screening test, not a primary screening tool.
• C. Pap smear requires laboratory infrastructure and trained personnel often unavailable at primary health centres.
• D. HPV DNA testing is more expensive and not the primary screening modality recommended at the PHC level in India currently.

Endometrioid adenocarcinoma is the most common histological type of endometrial carcinoma, accounting for about 80% of cases, and is classically type I, arising from unopposed estrogen stimulation in the setting of obesity, diabetes mellitus, nulliparity, late menopause, and polycystic ovarian disease. This patient's risk factor profile of obesity, diabetes, and nulliparity fits the type I pathway, which progresses through endometrial hyperplasia. Serous and clear cell carcinomas are type II tumors, unrelated to estrogen excess, typically arising in older, thinner women with atrophic endometrium and carrying a worse prognosis. Carcinosarcoma is a rare, aggressive biphasic tumor also not linked to the estrogen-excess risk profile.

• A. Serous carcinoma is a type II estrogen-independent tumor, typically seen in thin, elderly women with atrophic endometrium.
• C. Clear cell carcinoma is also estrogen-independent and not associated with obesity or unopposed estrogen exposure.
• D. Carcinosarcoma is a rare aggressive biphasic tumor unrelated to the classic estrogen-excess risk factors described.

CA-125 is the most widely used tumor marker for epithelial ovarian cancer, particularly useful in postmenopausal women with a complex adnexal mass showing malignant ultrasound features such as solid components, papillary projections, thick septations, increased vascularity, and ascites. Markedly elevated CA-125 in this clinical and sonographic context strongly supports epithelial ovarian malignancy, and the Risk of Malignancy Index combines CA-125 level, ultrasound score, and menopausal status for risk stratification. Alpha-fetoprotein and beta-hCG are markers for germ cell tumors, which occur predominantly in younger women, not a 55-year-old postmenopausal patient. CA 19-9 is more specific for pancreatic and mucinous ovarian tumors, but it is not the first-line marker in this scenario.

• A. Beta-hCG is elevated in germ cell tumors like choriocarcinoma, not typical epithelial ovarian cancer in this age group.
• B. Alpha-fetoprotein is elevated in germ cell tumors such as yolk sac tumor, typically seen in younger patients.
• D. CA 19-9 is more associated with mucinous ovarian tumors and pancreatic malignancy, not the primary marker here.

Meigs syndrome is classically defined as the triad of a benign ovarian fibroma, ascites, and pleural effusion (typically right-sided), all of which resolve completely after surgical removal of the tumor. The proposed mechanism involves transudation of fluid from the tumor surface into the peritoneal cavity, which then passes through diaphragmatic lymphatics or defects into the pleural space. Granulosa cell tumors are hormonally active and associated with precocious puberty or endometrial hyperplasia, not the classic Meigs triad. Dysgerminoma is a germ cell tumor of young women, and Brenner tumor is typically a small, incidental, benign transitional cell tumor without this fluid syndrome.

• A. Dysgerminoma is a malignant germ cell tumor of young women, unrelated to the fibroma-ascites-effusion triad.
• C. Brenner tumor is a small, usually incidental benign tumor not classically linked to ascites and pleural effusion.
• D. Granulosa cell tumors are estrogen-secreting and associated with endometrial hyperplasia, not the classic Meigs triad.

Red (carneous) degeneration occurs when a fibroid outgrows its blood supply during the rapid uterine growth of pregnancy, leading to venous thrombosis, hemorrhage, and infarction within the tumor. It classically presents in the second or third trimester with localized pain, low-grade fever, and tenderness over the fibroid, without peritonism or fetal compromise. Management is conservative with analgesics (paracetamol, short courses of NSAIDs avoided near term) and rest, as it is usually self-limiting. Imaging shows a heterogeneous appearance of the fibroid without features of torsion or abruption.

• B. Torsion requires a pedunculated fibroid on a vascular pedicle, and this is an intramural fibroid with no torsion seen on imaging.
• C. There is no source of ascending infection described, and fibroid infection is rare without instrumentation or necrosis from other causes.
• D. Malignant transformation to leiomyosarcoma is rare and would not present acutely like this; it is not suggested by the imaging findings.

This patient has stage 2 uterine prolapse (POP-Q), where the leading edge descends to the level of the hymen but not beyond it. In a woman who is a poor surgical candidate or prefers conservative management, a well-fitted vaginal pessary combined with topical estrogen to improve vaginal tissue tone and reduce erosion risk is the appropriate first-line option. Surgery (hysterectomy or sacrocolpopexy) is reserved for women who fail conservative management, desire definitive treatment, or have higher-stage prolapse with significant symptoms. Pelvic floor exercises alone have limited benefit once prolapse has progressed to stage 2 and are more useful for prevention or mild stage 1 disease.

• A. Sacrocolpopexy is a surgical option reserved for higher-grade prolapse or vault prolapse, not first-line for this patient.
• C. Surgery is not the first choice in a woman with comorbidities who prefers non-surgical management of stage 2 prolapse.
• D. Kegel exercises alone are insufficient once descent has reached the hymenal level and do not address her symptomatic prolapse.

This patient meets the minimum criteria for pelvic inflammatory disease: lower abdominal pain with cervical motion or adnexal tenderness, without another identifiable cause, in a sexually active woman. Current guidelines recommend empiric treatment should be started as soon as PID is suspected, without waiting for laparoscopic confirmation, to prevent long-term sequelae like tubal infertility and ectopic pregnancy. Outpatient therapy with a single dose of intramuscular ceftriaxone plus oral doxycycline (with or without metronidazole) covers Neisseria gonorrhoeae and Chlamydia trachomatis and is appropriate for mild-to-moderate disease without an abscess, high fever, or signs of peritonitis. Hospitalization and intravenous therapy are reserved for severe disease, tubo-ovarian abscess, pregnancy, or failure to respond to oral therapy.

• A. Metronidazole alone does not cover gonococcal or chlamydial infection, the key pathogens in PID.
• B. Inpatient intravenous therapy is reserved for severe disease, abscess, or pregnancy, not for mild-to-moderate PID as in this patient.
• D. Laparoscopy is not required to diagnose PID and treatment should not be delayed for it; it is reserved for uncertain diagnosis or failure to improve.