Reproductive Endocrinology Practice Questions

Q: Which of the following is NOT a feature of polycystic ovarian disease?

Polymenorrhea. **Explanation:** Polycystic Ovarian Syndrome (PCOS) is a complex endocrine disorder characterized by hyperandrogenism and ovulatory dysfunction. **Why Polymenorrhea is the correct answer:** In PCOS, the fundamental pathology is **chronic anovulation**. Due to the lack of regular ovulation, there is no progesterone production to stabilize the endometrium. This leads to **Oligomenorrhea** (infrequent periods, >35 days apart) or **Amenorrhea** (absence of periods). **Polymenorrhea** (frequent cycles <21 days) is not a feature of PCOS; it is more commonly associated with endometriosis, PID, or perimenopause. **Analysis of Incorrect Options:** * **Hirsutism (A):** This is a hallmark feature caused by **hyperandrogenism**. Excess LH stimulates the ovarian theca cells to produce androgens, leading to male-pattern hair growth. * **Obesity (C):** Approximately 50-60% of PCOS patients are obese. Obesity exacerbates **insulin resistance**, which further stimulates androgen production and suppresses SHBG (Sex Hormone Binding Globulin). * **Infertility (D):** PCOS is the most common cause of **anovulatory infertility**. The lack of a dominant follicle prevents regular egg release. **High-Yield Clinical Pearls for NEET-PG:** * **Rotterdam Criteria (2 of 3):** 1. Clinical/biochemical hyperandrogenism, 2. Oligo/anovulation, 3. Polycystic ovaries on ultrasound ("String of pearls" appearance). * **LH:FSH Ratio:** Classically elevated to **3:1** (though no longer a diagnostic requirement). * **Metabolic Risks:** Increased risk of Type 2 Diabetes, Dyslipidemia, and **Endometrial Carcinoma** (due to unopposed estrogen). * **Drug of Choice:** **Clomiphene Citrate** (traditionally) or **Letrozole** (now preferred for ovulation induction).

Q: Which of the following best diagnoses the luteal phase?

Endometrial biopsy. The diagnosis of the luteal phase depends on identifying the physiological changes induced by progesterone following ovulation. **Why Endometrial Biopsy is the Correct Answer:** Endometrial biopsy is considered the **gold standard** for diagnosing the luteal phase and assessing its functional adequacy. Under the influence of progesterone, the endometrium undergoes specific, predictable histological changes (secretory transformation). By performing a biopsy (traditionally on day 21–23 of a 28-day cycle), a pathologist can "date" the endometrium using **Noyes’ criteria**. If the histological date lags behind the menstrual date by more than 2 days, it indicates Luteal Phase Deficiency (LPD). **Analysis of Incorrect Options:** * **Serum Progesterone:** While a level >3 ng/mL confirms ovulation, a single mid-luteal measurement (Day 21) is often unreliable because progesterone is secreted in pulses. It reflects the presence of a corpus luteum but does not confirm if the end-organ (endometrium) is responding appropriately. * **Basal Body Temperature (BBT):** A rise of 0.4–0.8°F indicates the thermogenic effect of progesterone. However, it is retrospective, prone to user error, and only confirms that ovulation occurred, not the quality of the luteal phase. * **Ultrasonography:** USG can visualize the corpus luteum or a collapsed follicle, but it cannot provide functional or histological confirmation of the luteal phase. **High-Yield Clinical Pearls for NEET-PG:** * **Best time for biopsy:** 2–3 days before the expected onset of menstruation (Day 26 of a 28-day cycle) provides the most accurate dating. * **Fern Test:** Disappearance of the "fern pattern" and appearance of "cellular/beaded pattern" in cervical mucus also indicates the luteal phase. * **Progesterone Peak:** Occurs 7–8 days after the LH surge.

Q: In which of the following conditions does hypogonadism and anosmia coexist?

Kallman syndrome. ### Explanation **Kallmann Syndrome** is the correct answer because it is characterized by the failure of **GnRH-secreting neurons** to migrate from the olfactory placode to the hypothalamus during embryonic development. This results in: 1. **Hypogonadotropic Hypogonadism:** Low GnRH leads to low FSH/LH and subsequent low sex steroids (delayed puberty/amenorrhea). 2. **Anosmia or Hyposmia:** Due to the agenesis or hypoplasia of the olfactory bulbs. It is often associated with the *KAL-1* gene mutation (X-linked) or *FGFR1* mutations. **Analysis of Incorrect Options:** * **Mayer-Rokitansky-Küster-Hauser (MRKH) Syndrome:** Characterized by Müllerian agenesis (absent uterus and upper 2/3 of the vagina) in a 46,XX female. These patients have **normal ovarian function** and a normal sense of smell. * **Noonan Syndrome:** Often called "Male Turner Syndrome," it involves short stature, webbed neck, and pulmonary stenosis. While it can cause cryptorchidism and delayed puberty, it is not typically associated with anosmia. * **Asherman Syndrome:** An acquired condition involving intrauterine adhesions (synechiae) usually following over-vigorous curettage. It causes secondary amenorrhea but does not affect the hypothalamic-pituitary-ovarian axis or the sense of smell. **High-Yield Clinical Pearls for NEET-PG:** * **Inheritance:** Most commonly X-linked recessive (KAL-1 gene). * **Clinical Presentation:** Primary amenorrhea, failure of secondary sexual characteristics, and "color blindness" (sometimes associated). * **Diagnosis:** Low FSH, Low LH, Low Estrogen/Testosterone + MRI showing absent olfactory bulbs. * **Treatment:** Pulsatile GnRH or exogenous gonadotropins to induce puberty and fertility.

Q: Diethylstilbesterol causes which of the following defects, except?

Renal anomalies. **Explanation:** Diethylstilbestrol (DES) is a synthetic non-steroidal estrogen that was historically used to prevent miscarriages. However, it is a potent **teratogen** that interferes with the development of the **Müllerian ducts** (Paramesonephric ducts). **1. Why Renal Anomalies is the Correct Answer:** Renal anomalies are typically associated with primary Müllerian duct agenesis (e.g., Mayer-Rokitansky-Küster-Hauser syndrome) because the urinary and reproductive systems develop simultaneously from the intermediate mesoderm. However, DES exposure does not cause renal defects; it causes **structural remodeling** of the already formed reproductive tract. Therefore, renal anomalies are NOT a feature of DES exposure. **2. Analysis of Incorrect Options:** * **Vaginal Adenosis:** This is the most common structural change in DES-exposed daughters. It involves the persistence of glandular columnar epithelium in the vagina (which should normally be stratified squamous). It is a precursor to **Clear Cell Adenocarcinoma** of the vagina. * **T-shaped Uterus:** DES interferes with the mesenchymal-epithelial interactions during uterine development, leading to a constricted, T-shaped uterine cavity, which increases the risk of preterm labor and ectopic pregnancy. * **Perifimbrial Cysts:** DES exposure is associated with various adnexal abnormalities, including perifimbrial cysts, paratubal cysts, and fimbrial deformity. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Triad of DES Exposure:** Vaginal adenosis, T-shaped uterus, and Clear Cell Adenocarcinoma (Vagina/Cervix). * **Cervical Changes:** "Coxcomb" cervix, cervical collars, and cervical hypoplasia. * **Male Offspring:** DES exposure can lead to epididymal cysts, cryptorchidism, and microphallus. * **Key Association:** Always link DES with **Clear Cell Adenocarcinoma**; it is a favorite "except" type question in exams.

Q: Which of the following is NOT a component of the Rotterdam criteria for diagnosing polycystic ovarian syndrome?

Hyperinsulinism. The **Rotterdam Criteria (2003)** is the current gold standard for diagnosing Polycystic Ovarian Syndrome (PCOS). To make a diagnosis, at least **two out of the three** specific criteria must be present, after excluding other etiologies (like CAH or Cushing’s). ### Why Hyperinsulinism is the Correct Answer: While **hyperinsulinism** and insulin resistance are central to the pathophysiology of PCOS (driving the ovaries to produce excess androgens), they are **not** part of the formal diagnostic criteria. A patient can be diagnosed with PCOS even if they have normal insulin sensitivity, provided they meet the other criteria. ### Explanation of Incorrect Options: * **A. Multiple cysts in ovaries (PCO morphology):** Defined as ≥12 follicles (measuring 2–9 mm) in either ovary or an increased ovarian volume (>10 mL). *Note: Newer guidelines suggest ≥20 follicles if using high-frequency probes.* * **B. Anovulation:** Specifically, oligo-ovulation or anovulation, usually manifesting as irregular periods (cycles >35 days or <8 per year). * **C. Hyperandrogenism:** This can be **clinical** (hirsutism, acne, male-pattern baldness) or **biochemical** (elevated serum testosterone or DHEAS). ### High-Yield NEET-PG Pearls: * **LH:FSH Ratio:** Classically 3:1, but no longer used for diagnosis. * **Hirsutism Scoring:** The **Modified Ferriman-Gallwey score** is used (Score ≥8 is significant in most populations). * **Gold Standard Treatment:** Lifestyle modification (weight loss) is the first-line management. * **Drug of Choice:** **Clomiphene citrate** (traditionally) or **Letrozole** (now preferred) for ovulation induction; **Metformin** for insulin resistance.

Q: A patient presents with primary amenorrhea. On examination, she has normal breast and pubic hair development but no visible vagina. Which of the following is the most probable diagnosis?

Mullerian agenesis. **Explanation:** The patient presents with **primary amenorrhea** despite having **normal secondary sexual characteristics** (breast and pubic hair development). This indicates a functioning hypothalamic-pituitary-ovarian axis and normal peripheral response to hormones, but a structural defect in the outflow tract. **1. Why Mullerian Agenesis (MRKH Syndrome) is correct:** In Mullerian agenesis (Mayer-Rokitansky-Küster-Hauser syndrome), the 46,XX female has normal ovaries producing estrogen (leading to **normal breast development**) and normal adrenal/ovarian androgens (leading to **normal pubic hair**). However, the Mullerian ducts fail to develop, resulting in the absence of the uterus, cervix, and the upper two-thirds of the vagina. **2. Why the other options are incorrect:** * **Turner’s Syndrome (45,XO):** Characterized by "streak ovaries." The lack of estrogen results in **absent breast development** and primary amenorrhea. * **Androgen Insensitivity Syndrome (46,XY):** While these patients have breast development (due to peripheral conversion of testosterone to estrogen), they have **absent or scanty pubic and axillary hair** because of end-organ insensitivity to androgens. * **Swyer Syndrome (46,XY pure gonadal dysgenesis):** These patients have streak gonads and lack estrogen, leading to **absent breast development**. **High-Yield Clinical Pearls for NEET-PG:** * **First investigation:** Pelvic Ultrasound (to confirm the presence/absence of the uterus). * **Gold standard investigation:** MRI. * **Karyotype:** 46,XX (distinguishes it from AIS). * **Associated anomalies:** Renal (40% - e.g., renal agenesis, ectopic kidney) and Skeletal (12% - e.g., Klippel-Feil syndrome). Always screen the renal system in these patients.

Q: What are the causes of female pseudohermaphroditism?

21-alpha hydroxylase deficiency. **Explanation:** **Female Pseudohermaphroditism** (now termed 46,XX Disorder of Sex Development) refers to individuals with a 46,XX karyotype and normal ovaries, but whose external genitalia are virilized due to excessive androgen exposure in utero. **Why Option B is Correct:** **21-alpha hydroxylase deficiency** is the most common cause of **Congenital Adrenal Hyperplasia (CAH)**, accounting for over 90% of cases. In this condition, a block in the cortisol synthesis pathway leads to an accumulation of precursors (like 17-OH progesterone), which are shunted into the androgen pathway. The resulting high levels of testosterone cause virilization of the female fetus (ambiguous genitalia, clitoromegaly), making it the classic cause of female pseudohermaphroditism. **Why Other Options are Incorrect:** * **Option A (17-alpha hydroxylase deficiency):** This enzyme is required for the production of both cortisol and sex hormones. Deficiency leads to a **lack of androgens**, resulting in sexual infantilism in females and **male pseudohermaphroditism** (undervirilization) in males. * **Option C (Mixed Gonadal Dysgenesis):** This is a chromosomal disorder (typically 45,X/46,XY mosaicism) characterized by a streak gonad on one side and a testis on the other. It is not a cause of female pseudohermaphroditism, as the karyotype is not 46,XX. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of ambiguous genitalia** in a newborn: CAH (21-hydroxylase deficiency). * **Biochemical Marker:** Elevated **17-hydroxyprogesterone (17-OHP)**. * **Clinical Presentation:** Salt-wasting crisis (hyponatremia, hyperkalemia, hypotension) occurs in 75% of cases due to aldosterone deficiency. * **Maternal causes:** Androgen-secreting tumors (Luteoma of pregnancy) or intake of progestogens/androgens during pregnancy can also cause female pseudohermaphroditism.

Q: For hormonal study, which wall of the vagina should the sample be taken from?

Lateral wall. **Explanation:** In gynecological practice, hormonal evaluation via vaginal cytology (often referred to as a **Maturation Index**) relies on the assessment of squamous epithelial cells. The correct site for sampling is the **upper third of the lateral vaginal wall**. **Why the Lateral Wall?** The lateral vaginal wall is the most sensitive to hormonal fluctuations (estrogen and progesterone) because it is less affected by external factors. Estrogen promotes the maturation of the epithelium into superficial cells, while progesterone leads to an increase in intermediate cells. Sampling from this specific site provides a "clean" hormonal profile, as it is relatively protected from inflammatory changes and mechanical irritation. **Why other options are incorrect:** * **Anterior Wall:** This area is frequently subject to mechanical friction and is in close proximity to the urethra, which can lead to contamination with inflammatory cells or urinary sediment, skewing the hormonal interpretation. * **Posterior Wall:** This site is the primary reservoir for the **vaginal pool**. Samples taken here often contain debris, inflammatory exudate, and degenerating cells from the cervix or uterus, making it unsuitable for accurate hormonal cytological assessment. * **Any Wall:** Hormonal assessment requires standardization. Using "any wall" would lead to inconsistent results due to the varying degrees of inflammation and debris found in different vaginal fornices. **High-Yield NEET-PG Pearls:** * **Maturation Index (MI):** Expressed as a ratio of **Parabasal : Intermediate : Superficial** cells. * **Estrogen Effect:** Causes a "shift to the right" (increase in superficial cells). * **Progesterone Effect:** Causes a "shift to the middle" (increase in intermediate cells). * **Clinical Use:** Though largely replaced by serum assays, it remains a classic exam topic for assessing primary amenorrhea or menopause.

Question 1

Which of the following is NOT a feature of polycystic ovarian disease?

Accepted Answer

Polymenorrhea

Answer

Hirsutism

Answer

Obesity

Answer

Infertility

Question 2

Which of the following best diagnoses the luteal phase?

Accepted Answer

Endometrial biopsy

Answer

Serum progesterone levels

Answer

Basal body temperature

Answer

Ultrasonography

Question 3

In which of the following conditions does hypogonadism and anosmia coexist?

Accepted Answer

Kallman syndrome

Answer

Mayer-Rokitansky-Kuster syndrome

Answer

Noonan Syndrome

Answer

Ashermann syndrome

Question 4

Diethylstilbesterol causes which of the following defects, except?

Accepted Answer

Renal anomalies

Answer

Perifimbrial cysts

Answer

T shaped uterus

Answer

Vaginal adenosis

Question 5

Which of the following is NOT a component of the Rotterdam criteria for diagnosing polycystic ovarian syndrome?

Accepted Answer

Hyperinsulinism

Answer

Multiple cysts in ovaries seen on ultrasound

Answer

Anovulation

Answer

Clinical or biochemical hyperandrogenism

Question 6

A patient presents with primary amenorrhea. On examination, she has normal breast and pubic hair development but no visible vagina. Which of the following is the most probable diagnosis?

Accepted Answer

Mullerian agenesis

Answer

Turner's syndrome

Answer

Androgen insensitivity syndrome

Answer

Swyer syndrome

Question 7

What are the causes of female pseudohermaphroditism?

Accepted Answer

21-alpha hydroxylase deficiency

Answer

17-alpha hydroxylase deficiency

Answer

Mixed gonadal dysgenesis

Answer

All of the above

Question 8

For hormonal study, which wall of the vagina should the sample be taken from?

Accepted Answer

Lateral wall

Answer

Anterior wall

Answer

Posterior wall

Answer

Any wall

Question 9

Which of the following hormonal changes are typically observed in Polycystic Ovary Syndrome (PCOS)?
(i) Luteinizing hormone (LH) is elevated
(ii) Total free estrone is decreased
(iii) Insulin is elevated
(iv) Sex hormone-binding globulin (SHBG) is increased
(v) Progesterone is decreased

Accepted Answer

True, False, True, False, True

Answer

False, False, True, True, False

Answer

True, True, True, False, True

Answer

False, True, True, False, True

Question 10

Which of the following conditions presents with the absence of both Mullerian and Wolffian duct structures?

Accepted Answer

Androgen Insensitivity Syndrome

Answer

Antimullerian Hormone deficiency

Answer

FSH Receptor defect

Answer

Ovotesticular syndrome

Reproductive Endocrinology — MCQs

Reproductive Endocrinology — MCQs

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