Reproductive Endocrinology Practice Questions

Q: In which of the following conditions do the ovaries function normally?

Rokitansky-Kuster-Hauser syndrome. **Explanation:** The core concept tested here is the embryological origin of the female reproductive system. The ovaries develop from the **primitive germ cells** (genital ridge), whereas the uterus, cervix, and upper vagina develop from the **Müllerian (paramesonephric) ducts**. **1. Why Rokitansky-Kuster-Hauser (MRKH) Syndrome is correct:** MRKH syndrome is characterized by **Müllerian Agenesis**. Because the ovaries have a different embryological origin than the Müllerian ducts, they develop and function normally. Patients have a female karyotype (46, XX), normal secondary sexual characteristics (due to estrogen from functional ovaries), and normal ovulation, but present with primary amenorrhea due to the absence of the uterus and upper vagina. **2. Why the other options are incorrect:** * **Turner’s Syndrome (45, XO):** Accelerated atresia of germ cells leads to **"streak ovaries"** and primary ovarian failure. Estrogen levels are low, and FSH is elevated. * **Androgen Insensitivity Syndrome (46, XY):** These individuals have **testes**, not ovaries. The testes produce testosterone (converted to estrogen peripherally) and Anti-Müllerian Hormone (AMH), which causes the absence of a uterus. * **Swyer’s Syndrome (46, XY Pure Gonadal Dysgenesis):** Due to a failure in testicular development, the gonads remain as non-functional **streaks**. There are no functioning ovaries. **High-Yield Clinical Pearls for NEET-PG:** * **MRKH Syndrome:** Most common cause of primary amenorrhea with normal secondary sexual characteristics. * **Association:** Always screen for **renal anomalies** (e.g., renal agenesis, pelvic kidney) in MRKH patients (found in ~30-40%). * **Hormonal Profile in MRKH:** Normal FSH, LH, and Estrogen (confirms normal ovarian axis). * **Management:** Neovagina creation (Frank’s dilators or McIndoe procedure); pregnancy is possible only via surrogacy.

Q: In hypergonadotropic hypogonadism, what is the typical FSH level?

Greater than 40 mIU/mL. ### Explanation **Concept Overview:** Hypergonadotropic hypogonadism refers to **primary gonadal failure**. In this condition, the defect lies within the ovaries (e.g., Premature Ovarian Failure or Menopause). Because the ovaries fail to produce estrogen and inhibin, there is a loss of negative feedback on the pituitary gland. This results in a compensatory, massive increase in the secretion of Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH). **Why Option D is Correct:** In clinical practice and for NEET-PG purposes, an **FSH level >40 mIU/mL** is the diagnostic hallmark of permanent ovarian failure or menopause. While levels above 20 mIU/mL indicate declining ovarian reserve, the threshold of 40 mIU/mL is specifically used to define the "hypergonadotropic" state associated with complete gonadal failure. **Analysis of Incorrect Options:** * **Options A & B ( 20 mIU/mL):** While FSH levels between 20–40 mIU/mL are elevated and suggest "incipient" ovarian failure or decreased ovarian reserve, they do not meet the definitive diagnostic criteria for hypergonadotropic hypogonadism (menopausal range). **NEET-PG High-Yield Pearls:** * **Gold Standard Marker:** FSH is the most sensitive marker for diagnosing menopause/primary ovarian failure. * **Premature Ovarian Failure (POF):** Defined as secondary amenorrhea with FSH >40 mIU/mL on two occasions (at least 1 month apart) in a woman aged 2:1, but in hypergonadotropic hypogonadism, both are elevated, with FSH typically rising higher and earlier than LH. * **Kallmann Syndrome:** A classic example of *Hypogonadotropic* hypogonadism (Low FSH/LH + Anosmia).

Q: Precocious puberty is most characteristic of which of the following conditions?

Albright's syndrome. **Explanation:** **Albright’s Syndrome** (specifically McCune-Albright Syndrome) is the correct answer because it is a classic cause of **GnRH-independent (peripheral) precocious puberty**. It is characterized by a clinical triad: 1. **Polyostotic fibrous dysplasia:** Multiple cystic bone lesions. 2. **Café-au-lait spots:** Large, irregular skin pigmentations (often described as having "Coast of Maine" borders). 3. **Autonomous endocrine hyperfunction:** Most commonly presenting as precocious puberty due to estrogen secretion from ovarian cysts. The underlying pathophysiology involves a somatic mutation in the **GNAS gene**, leading to constitutive activation of the G-protein signaling (adenylate cyclase), which mimics the effect of continuous hormonal stimulation (FSH/LH) on the ovaries. **Analysis of Incorrect Options:** * **Jaffe’s Syndrome:** This is a variant of fibrous dysplasia that presents with café-au-lait spots and bone lesions but **lacks** the endocrine abnormalities (precocious puberty) seen in McCune-Albright. * **Monostotic fibrous dysplasia:** This involves a single bone lesion and is not associated with systemic endocrine manifestations or skin pigmentation. * **Osteogenesis imperfecta:** A genetic disorder of Type 1 collagen characterized by brittle bones, blue sclera, and hearing loss, but it does not cause precocious puberty. **High-Yield Clinical Pearls for NEET-PG:** * **McCune-Albright Syndrome** is more common in girls. * It is a **peripheral** cause of precocious puberty; therefore, LH/FSH levels will be suppressed (low), and the patient will not respond to GnRH analogues. * The café-au-lait spots in this syndrome are typically unilateral and do not cross the midline. * **Treatment:** Aromatase inhibitors (e.g., Letrozole) or Estrogen receptor antagonists (e.g., Tamoxifen) are used to manage the precocity.

Q: A sample of cervical mucus is taken on Day 12 of the menstrual cycle. The mucus is thin, clear, and elastic. When placed under a microscope, what microscopic finding would be expected?

A fern pattern characteristic of estrogen. **Explanation:** The correct answer is **C. A fern pattern characteristic of estrogen.** **1. Why the correct answer is right:** On Day 12 of a typical 28-day menstrual cycle (the late follicular/pre-ovulatory phase), estrogen levels are at their peak. High estrogen levels act on the cervical glands to produce mucus that is thin, watery, alkaline, and rich in sodium chloride. When this mucus is dried on a glass slide, the crystallization of the salts creates a characteristic microscopic appearance known as **arborization** or a **"fern pattern."** This change increases the "Spinnbarkeit" (elasticity), facilitating sperm penetration and survival. **2. Why the incorrect options are wrong:** * **Option A:** While the mucus is clear clinically, a "clear field" under a microscope is not a diagnostic finding for cycle dating. The presence or absence of bacteria is not the defining feature of the periovulatory phase. * **Option B:** Thick mucus with background cellularity/bacteria is characteristic of the **luteal phase** (post-ovulation). Under the influence of **progesterone**, cervical mucus becomes thick, viscous, and cellular, which inhibits the fern pattern (anti-estrogenic effect). * **Option D:** Parabasal cells are a feature of vaginal cytology in low-estrogen states (e.g., menopause or prepuberty), not a finding in cervical mucus during the reproductive cycle. **3. NEET-PG High-Yield Pearls:** * **Ferning (Arborization):** Indicates high estrogen; disappears after Day 21 due to progesterone. * **Spinnbarkeit Test:** Measures the elasticity of mucus. Maximum elasticity (>10 cm) occurs just before ovulation. * **Progesterone Effect:** Causes "Beading" or a cellular pattern; it is the basis for using cervical mucus as a natural contraceptive method (Billings method). * **Palm Leaf Pattern:** Another name for the fern pattern seen in cervical mucus.

Q: Which of the following clinical features is seen in Polycystic Ovarian Disease (PCOD)?

Streak ovaries. **Explanation:** The question asks for a clinical feature **not** typically associated with Polycystic Ovarian Disease (PCOD/PCOS), as **Streak Ovaries** is the characteristic finding in **Turner Syndrome (45,XO)** and Pure Gonadal Dysgenesis, not PCOD. **1. Why "Streak Ovaries" is the Correct Answer (The Exception):** In PCOD, the ovaries are typically **enlarged** (volume >10cc) with multiple small peripheral follicles (string-of-pearls appearance). In contrast, **streak ovaries** occur due to accelerated atresia of germ cells, resulting in fibrous tissue bands devoid of follicles. This is a hallmark of hypergonadotropic hypogonadism (e.g., Turner Syndrome). **2. Analysis of Incorrect Options:** * **Hirsutism:** This is a classic feature of PCOD, resulting from **hyperandrogenism**. It is clinically graded using the Modified Ferriman-Gallwey score. * **Secondary Amenorrhea:** PCOD is the most common cause of chronic anovulation. Patients typically present with oligomenorrhea or secondary amenorrhea due to the lack of progesterone withdrawal. * **Elevated FSH/LH ratio:** This is a distractor. In PCOD, the **LH/FSH ratio is increased** (typically >2:1 or 3:1) because of increased GnRH pulse frequency. Therefore, a "decreased" FSH/LH ratio is seen, but the presence of hormonal imbalance remains a core feature. **High-Yield Clinical Pearls for NEET-PG:** * **Rotterdam Criteria (2 out of 3):** 1. Clinical/Biochemical Hyperandrogenism, 2. Oligo/Anovulation, 3. Polycystic ovaries on USG. * **Gold Standard Investigation:** Transvaginal Ultrasound (TVS). * **Metabolic Link:** Hyperinsulinemia and Insulin Resistance are central to the pathogenesis. * **Drug of Choice:** Clomiphene Citrate (traditional) or **Letrozole** (current first-line for ovulation induction).

Q: Which of the following is NOT a typical sign of hyperandrogenism seen in Polycystic Ovary Syndrome (PCOS)?

Clitoromegaly. **Explanation:** In Polycystic Ovary Syndrome (PCOS), hyperandrogenism is typically **biochemical** (elevated serum testosterone/androstenedione) or **clinical** (signs of mild-to-moderate androgen excess). **Why Clitoromegaly is the correct answer:** Clitoromegaly is a sign of **virilization**, not simple hyperandrogenism. Virilization involves extreme androgen excess that causes masculine physical changes, including clitoromegaly (clitoral index >35 $mm^2$), deepening of the voice, and increased muscle mass. If a patient presents with these signs, clinicians must rule out more serious pathologies like **Androgen-Secreting Ovarian Tumors** (e.g., Sertoli-Leydig cell tumors) or **Adrenal Tumors**, as PCOS rarely produces androgen levels high enough to cause structural changes like clitoromegaly. **Analysis of Incorrect Options:** * **A. Hirsutism:** The most common clinical sign of PCOS (seen in ~70% of cases), characterized by terminal hair growth in a male-pattern distribution (measured by the Modified Ferriman-Gallwey score). * **C. Androgenic Alopecia:** Thinning of scalp hair, typically in the vertex or crown area, is a recognized cutaneous manifestation of hyperandrogenism in PCOS. * **D. Acne:** Persistent inflammatory acne, especially in the "U-zone" (jawline), is a common dermatological marker of elevated circulating androgens. **NEET-PG High-Yield Pearls:** * **Rotterdam Criteria (2003):** Diagnosis requires 2 out of 3: (1) Oligo/Anovulation, (2) Hyperandrogenism (Clinical/Biochemical), (3) Polycystic ovaries on USG. * **Virilization vs. Hyperandrogenism:** PCOS = Hyperandrogenism; Ovarian/Adrenal Tumors = Virilization. * **Gold Standard for Hirsutism:** Modified Ferriman-Gallwey (mFG) score; a score $\geq$ 8 is significant in the Indian population.

Q: What is the commonest cause of female pseudohermaphroditism?

Congenital adrenal hyperplasia. **Explanation:** **Female pseudohermaphroditism** (now referred to as 46,XX Disorder of Sexual Development) is characterized by a normal female genotype (46,XX) and normal ovaries, but with ambiguous or virilized external genitalia due to excess androgen exposure in utero. **Why Congenital Adrenal Hyperplasia (CAH) is correct:** CAH is the **most common cause** of female pseudohermaphroditism, accounting for approximately 90-95% of cases. It is an autosomal recessive disorder, most commonly due to **21-hydroxylase deficiency**. This enzyme defect impairs cortisol synthesis, leading to an increase in Adrenocorticotropic Hormone (ACTH). Elevated ACTH overstimulates the adrenal cortex, diverting precursors into the androgen pathway, resulting in fetal virilization. **Analysis of Incorrect Options:** * **A & C (Virilizing ovarian tumor / Exogenous androgen):** While maternal exposure to androgenic drugs or maternal androgen-secreting tumors (like Luteoma of pregnancy) can cause virilization of a female fetus, these are significantly rarer than CAH. * **B (Ovarian dysgenesis):** This (e.g., Turner Syndrome) typically presents with streak gonads and primary amenorrhea, but the external genitalia are usually normally developed female, not virilized. **NEET-PG High-Yield Pearls:** * **Most common enzyme deficiency in CAH:** 21-hydroxylase (leads to high 17-OH Progesterone). * **Prader Staging:** Used to grade the degree of virilization of external genitalia. * **Clinical Presentation:** Look for salt-wasting (hyponatremia, hyperkalemia) in the classic form. * **Internal Genitalia:** In female pseudohermaphroditism, the **Mullerian structures (uterus, tubes, upper vagina) are always present** because there is no Anti-Mullerian Hormone (AMH).

Q: A 24-year-old patient has been diagnosed with androgen-insensitivity syndrome. The patient is likely to have all of the following signs EXCEPT?

Menstruation. **Explanation:** Androgen Insensitivity Syndrome (AIS), formerly known as Testicular Feminization Syndrome, is an X-linked recessive condition where there is a mutation in the androgen receptor. This leads to a complete or partial resistance to the action of testosterone. **Why "Menstruation" is the correct answer:** In AIS, the karyotype is **46, XY**. The testes are present (usually intra-abdominal) and secrete **Anti-Müllerian Hormone (AMH)**. AMH causes the regression of Müllerian structures, meaning the patient has **no uterus, fallopian tubes, or upper third of the vagina**. Without a uterus and endometrium, menstruation is physiologically impossible. This is a classic cause of primary amenorrhea. **Analysis of Incorrect Options:** * **A. An XY chromosome complement:** This is a feature of AIS. Patients are genetically male but phenotypically female due to the inability of tissues to respond to androgens. * **C. Female external genitalia:** Since the body cannot respond to Dihydrotestosterone (DHT), the external genitalia default to the female phenotype. The vagina is typically short and blind-ending (pouch). * **D. Heterosexuality:** In medical board exams, sexual orientation is generally defined by the gender of rearing. Since these patients are raised as females and have a female gender identity, being attracted to males is classified as heterosexuality. **NEET-PG High-Yield Pearls:** * **Phenotype:** Tall stature, well-developed breasts (due to peripheral conversion of testosterone to estrogen), but **absent/scant axillary and pubic hair** (the "hairless woman"). * **Diagnosis:** High Testosterone levels, high LH, and 46, XY karyotype. * **Management:** Gonadectomy is performed **after puberty** (to allow natural breast development) to prevent gonadoblastoma/dysgerminoma. * **Differential:** Distinguish from Müllerian Agenesis (MRKH), where the karyotype is 46, XX and testosterone levels are normal.

Question 1

In which of the following conditions do the ovaries function normally?

Accepted Answer

Rokitansky-Kuster-Hauser syndrome

Answer

Turner's syndrome

Answer

Androgen insensitivity syndrome

Answer

Swyer's syndrome

Question 2

In hypergonadotropic hypogonadism, what is the typical FSH level?

Accepted Answer

Greater than 40 mIU/mL

Answer

Less than 20 mIU/mL

Answer

Less than 40 mIU/mL

Answer

Greater than 20 mIU/mL

Question 3

What percentage of pregnancies are affected by Hemorrhagic Motivation Group (HMG)?

Accepted Answer

30%

Answer

5%

Answer

10%

Answer

20%

Question 4

Precocious puberty is most characteristic of which of the following conditions?

Accepted Answer

Albright's syndrome

Answer

Jaffe's Syndrome

Answer

Monostotic fibrous dysplasia

Answer

Osteogenesis imperfecta

Question 5

Which of the following prostaglandins induces aromatase activity in endometrial stromal cells?

Accepted Answer

PGE2

Answer

PGE1

Answer

PGF2

Answer

PGD2

Question 6

A sample of cervical mucus is taken on Day 12 of the menstrual cycle. The mucus is thin, clear, and elastic. When placed under a microscope, what microscopic finding would be expected?

Accepted Answer

A fern pattern characteristic of estrogen

Answer

Clear field devoid of bacteria

Answer

Thick mucus with background bacteria

Answer

Clearly defined, parabasal cells

Question 7

Which of the following clinical features is seen in Polycystic Ovarian Disease (PCOD)?

Accepted Answer

Streak ovaries

Answer

Hirsutism

Answer

Secondary amenorrhea

Answer

Elevated FSH/LH ratio

Question 8

Which of the following is NOT a typical sign of hyperandrogenism seen in Polycystic Ovary Syndrome (PCOS)?

Accepted Answer

Clitoromegaly

Answer

Hirsutism

Answer

Androgenic Alopecia

Answer

Acne

Question 9

What is the commonest cause of female pseudohermaphroditism?

Accepted Answer

Congenital adrenal hyperplasia

Answer

Virilizing ovarian tumor

Answer

Ovarian dysgenesis

Answer

Exogenous androgen

Question 10

A 24-year-old patient has been diagnosed with androgen-insensitivity syndrome. The patient is likely to have all of the following signs EXCEPT?

Accepted Answer

Menstruation

Answer

An XY chromosome complement

Answer

Female external genitalia

Answer

Heterosexuality

Reproductive Endocrinology — MCQs

Reproductive Endocrinology — MCQs

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