Reproductive Endocrinology — MCQs

How many of the following 5 criteria are required for the diagnosis of metabolic syndrome associated with polycystic ovarian syndrome? The criteria are: Female waist >35 inches, Triglycerides >150 mg/dL, HDL <50 mg/dL, Blood pressure >130/85 mm Hg, and Fasting glucose: 110-126 mg/dL/Two-hour glucose (75 gm OGTT): 140-199 mg/dL.

Q107Easy

Clomiphene citrate is indicated in:

Q108Easy

What is the cut-off point of serum estrogen level for the diagnosis of ovarian failure?

Q109Medium

Normal ovaries are seen in which of the following conditions?

Q110Easy

In galactorrhea-amenorrhea syndrome, what investigation should be advised apart from serum prolactin levels?

Reproductive Endocrinology Indian Medical PG Practice Questions and MCQs

Question 101: A lady presented with hirsutism, anovulation, and increased estrogen levels. Which of the following diagnostic investigations helps in diagnosis?

A. Prolactin level
B. LH, T
C. FSH/LH ratio (Correct Answer)
D. Testosterone, epiandrostenedione

Explanation: ### Explanation The clinical triad of **hirsutism** (hyperandrogenism), **anovulation**, and **increased estrogen levels** (due to peripheral conversion of androgens) is classic for **Polycystic Ovarian Syndrome (PCOS)**. **Why FSH/LH ratio is the correct answer:** In PCOS, there is a characteristic derangement in the hypothalamic-pituitary-ovarian axis. Increased GnRH pulse frequency leads to preferential secretion of **LH** over **FSH**. * **LH** stimulates the Theca cells to produce excess androgens. * **FSH** levels remain relatively low or normal, leading to a failure of follicular maturation. * A **reversed FSH/LH ratio** (specifically an **LH:FSH ratio > 2:1 or 3:1**) is a classic biochemical marker used to support the diagnosis of PCOS in a clinical setting. **Analysis of Incorrect Options:** * **A. Prolactin level:** While hyperprolactinemia can cause anovulation, it does not typically cause hirsutism or elevated estrogen. It is measured to rule out other causes of amenorrhea. * **B. LH, T:** While both are elevated in PCOS, the *ratio* between the gonadotropins is a more specific diagnostic indicator for the underlying endocrine pathology than individual levels. * **D. Testosterone, epiandrostenedione:** These assess hyperandrogenism. While total testosterone is often elevated, epiandrostenedione is not a standard diagnostic marker (DHEAS is more commonly used to rule out adrenal sources). **NEET-PG High-Yield Pearls:** * **Rotterdam Criteria (2 of 3):** 1. Clinical/Biochemical Hyperandrogenism; 2. Oligo/Anovulation; 3. Polycystic ovaries on USG (≥12 follicles or volume >10cc). * **Gold Standard for Hirsutism:** Ferriman-Gallwey Score. * **Metabolic Hallmark:** Insulin resistance and compensatory hyperinsulinemia (decreases SHBG, further increasing free testosterone). * **First-line treatment:** Lifestyle modification (weight loss). For hirsutism: OCPs. For ovulation induction: Letrozole (now preferred over Clomiphene).

Question 102: What is the treatment for hypogonadotropic primary amenorrhea?

A. Gonadotropin therapy (Correct Answer)
B. Estrogens and progesterone
C. Assisted reproductive techniques
D. None of the above

Explanation: **Explanation:** **Hypogonadotropic primary amenorrhea** is characterized by low levels of FSH and LH due to hypothalamic or pituitary failure (e.g., Kallmann syndrome). The goal of treatment depends on the patient's immediate desire for fertility versus the development of secondary sexual characteristics. **Why Option A is Correct:** In patients with hypogonadotropic hypogonadism who wish to **achieve pregnancy**, the definitive treatment is **Gonadotropin therapy** (exogenous FSH and LH) or pulsatile GnRH. Since the ovaries are functional but lack stimulation, providing these hormones directly induces follicular development and ovulation, addressing the root cause of the infertility. **Why Other Options are Incorrect:** * **Option B (Estrogens and Progesterone):** While these are used to induce secondary sexual characteristics (breast development) and prevent osteoporosis, they **cannot induce ovulation**. They are used for hormone replacement therapy (HRT) but are not the primary treatment for achieving reproductive function in these patients. * **Option C (Assisted Reproductive Techniques):** ART (like IVF) is usually a second-line or escalated treatment. Most patients with hypogonadotropic hypogonadism respond excellently to simple ovulation induction with gonadotropins alone. **NEET-PG High-Yield Pearls:** * **Kallmann Syndrome:** The most common cause of hypogonadotropic primary amenorrhea; look for the triad of **amenorrhea, anosmia, and midline facial defects.** * **Diagnostic Marker:** Low FSH (<5 mIU/mL) and low Estrogen. * **Progesterone Challenge Test:** Will be **negative** (no withdrawal bleed) because the endometrium is not primed due to lack of endogenous estrogen. * **Treatment Priority:** If fertility is *not* desired, start with HRT (Estrogen) to prevent bone loss and promote puberty. If fertility *is* desired, the answer is always Gonadotropins.

Question 103: All of the following are used in the management of endometriosis except?

A. Progesterone
B. Danazol
C. GnRH agonist
D. Estrogen (Correct Answer)

Explanation: **Explanation:** Endometriosis is an **estrogen-dependent** inflammatory condition characterized by the presence of endometrial tissue outside the uterus. The primary goal of medical management is to induce a "hypoestrogenic" state or "pseudopregnancy" to cause atrophy of the ectopic endometrial implants. **Why Estrogen is the Correct Answer:** Estrogen stimulates the proliferation of endometrial tissue. Administering estrogen would exacerbate the disease, increase pain, and promote the growth of endometriotic lesions. Therefore, it is contraindicated as a monotherapy in the management of endometriosis. **Analysis of Other Options:** * **Progesterone (Option A):** Induces a "pseudopregnancy" state. It causes decidualization and eventual atrophy of the endometrial tissue. * **Danazol (Option B):** An androgenic steroid that inhibits the mid-cycle LH/FSH surge and creates a high-androgen, low-estrogen environment ("pseudomenopause"), leading to lesion regression. * **GnRH Agonists (Option C):** (e.g., Leuprolide) Continuous administration causes downregulation of pituitary GnRH receptors, leading to profound hypoestrogenism ("medical oophorectomy"). **NEET-PG High-Yield Pearls:** * **Gold Standard Diagnosis:** Laparoscopy (visual confirmation with biopsy). * **First-line Medical Management:** Combined Oral Contraceptive Pills (COCPs) or NSAIDs for pain. * **Add-back Therapy:** When using GnRH agonists for >6 months, small doses of estrogen/progesterone are added to prevent bone mineral density loss and vasomotor symptoms. * **Definitive Treatment:** Total Abdominal Hysterectomy with Bilateral Salpingo-Oophorectomy (TAH + BSO).

Question 104: Normal stature with minimal or absent pubertal development may be seen in which of the following conditions?

A. Testicular feminization
B. Kallman syndrome (Correct Answer)
C. Pure gonadal dysgenesis
D. Turner syndrome

Explanation: In cases of delayed puberty, the combination of **stature** and **sexual development** is a critical diagnostic triad for the NEET-PG exam. ### **Why Kallmann Syndrome is Correct** Kallmann syndrome is a form of **hypogonadotropic hypogonadism** caused by the failure of GnRH-secreting neurons to migrate from the olfactory placode to the hypothalamus. * **Pubertal Development:** Due to GnRH deficiency, there is a lack of FSH/LH, leading to minimal or absent secondary sexual characteristics (sexual infantilism). * **Stature:** Unlike Turner syndrome, there is no chromosomal abnormality affecting growth genes (like the SHOX gene). Patients usually have **normal to tall stature** because the absence of sex steroids leads to delayed closure of the epiphyseal plates, allowing for prolonged long bone growth. ### **Analysis of Incorrect Options** * **A. Testicular Feminization (AIS):** These patients have **well-developed breasts** (due to peripheral conversion of testosterone to estrogen) and a female phenotype, despite a 46,XY karyotype. * **C. Pure Gonadal Dysgenesis (Swyer Syndrome):** While these patients have sexual infantilism and normal/tall stature, Kallmann syndrome is a more classic association for "minimal" development in the context of hypothalamic-pituitary failure. However, in many clinical scenarios, Swyer could present similarly; but Kallmann is distinguished by associated features like anosmia. * **D. Turner Syndrome (45,XO):** The hallmark of Turner syndrome is **short stature** (due to SHOX gene haploinsufficiency) along with streak ovaries and sexual infantilism. ### **Clinical Pearls for NEET-PG** * **Kallmann Syndrome Triad:** Hypogonadotropic hypogonadism + Anosmia/Hyposmia + Normal/Tall stature. * **Turner Syndrome:** Short stature + Sexual infantilism + Increased FSH/LH (Hypergonadotropic). * **AIS:** Normal female breast development + Absent/Scanty pubic hair + Blind-ending vagina. * **Delayed Epiphyseal Closure:** Any condition with low estrogen/testosterone during adolescence (like Kallmann or Swyer) typically results in **eunuchoid body proportions** (Arm span > Height).

Question 105: Which of the following is NOT related to granulosa cells?

A. It has no blood supply
B. In the first half of the cycle, it has no steroidogenic function (Correct Answer)
C. Granulosa cells produce activin and inhibin
D. Estrogen stimulates the proliferation of granulosa cells

Explanation: **Explanation:** The correct answer is **B**, as the statement "it has no steroidogenic function in the first half of the cycle" is incorrect. Granulosa cells are active throughout the follicular phase (the first half of the cycle). Under the influence of FSH, they express the enzyme **aromatase**, which converts androgens (produced by theca cells) into **estradiol**. Thus, they have a vital steroidogenic role from the beginning of the cycle. **Analysis of other options:** * **Option A (No blood supply):** This is a correct statement regarding granulosa cells. The follicle is an avascular structure separated from the vascularized theca layer by a basement membrane (membrana propria). Blood vessels only penetrate the granulosa layer after ovulation during the formation of the corpus luteum. * **Option C (Produce activin and inhibin):** This is correct. Granulosa cells are the primary source of Inhibin B (dominant in the follicular phase), Inhibin A (dominant in the luteal phase), and Activins, which regulate FSH secretion via feedback to the pituitary. * **Option D (Estrogen stimulates proliferation):** This is correct. Estrogen acts locally within the follicle to stimulate granulosa cell mitosis, creating a positive feedback loop that promotes follicular growth. **NEET-PG High-Yield Pearls:** * **Two-Cell, Two-Gonadotropin Theory:** Theca cells (stimulated by LH) produce androgens; Granulosa cells (stimulated by FSH) convert those androgens to estrogens. * **FSH receptors** are found exclusively on granulosa cells. * **LH receptors** are initially only on theca cells but appear on granulosa cells of the dominant follicle just before the LH surge. * **Inhibin B** is a marker of ovarian reserve.

Question 106: How many of the following 5 criteria are required for the diagnosis of metabolic syndrome associated with polycystic ovarian syndrome? The criteria are: Female waist >35 inches, Triglycerides >150 mg/dL, HDL <50 mg/dL, Blood pressure >130/85 mm Hg, and Fasting glucose: 110-126 mg/dL/Two-hour glucose (75 gm OGTT): 140-199 mg/dL.

A. 2 out of 5
B. 3 out of 5 (Correct Answer)
C. All five
D. Any one of these is enough for diagnosis

Explanation: The diagnosis of **Metabolic Syndrome** in patients with Polycystic Ovarian Syndrome (PCOS) follows the **Modified NCEP ATP III criteria**. This syndrome is a cluster of metabolic abnormalities that significantly increase the risk of cardiovascular disease and Type 2 Diabetes Mellitus. ### 1. Why 3 out of 5 is Correct To diagnose metabolic syndrome, a patient must meet **at least 3 out of the 5** following criteria: 1. **Abdominal Obesity:** Waist circumference **>35 inches** (88 cm) in women. 2. **Hypertriglyceridemia:** Triglycerides **≥150 mg/dL** (or on medication). 3. **Low HDL Cholesterol:** **<50 mg/dL** in women (or on medication). 4. **Hypertension:** Blood pressure **≥130/85 mm Hg** (or on medication). 5. **Impaired Glycemia:** Fasting glucose **≥100 mg/dL** (Note: The question uses the 110 mg/dL threshold from original criteria, but current guidelines often use ≥100 mg/dL) or a 2-hour OGTT of 140–199 mg/dL. ### 2. Why Other Options are Incorrect * **A (2 out of 5):** Meeting only two criteria indicates metabolic risk but does not fulfill the formal diagnostic threshold for the "syndrome." * **C (All five):** While a patient may have all five, it is not a requirement. The syndrome is defined by the *clustering* of at least three factors. * **D (Any one):** Individual components (like isolated hypertension) are managed separately; the "syndrome" specifically identifies the synergistic risk of multiple metabolic derangements. ### 3. High-Yield Clinical Pearls for NEET-PG * **Insulin Resistance:** This is the core pathophysiology linking PCOS and Metabolic Syndrome. * **Gold Standard for IR:** The Hyperinsulinemic Euglycemic Clamp (though rarely used clinically). * **Screening:** All women with PCOS, regardless of BMI, should be screened for metabolic syndrome using BP, lipid profile, and a 75g OGTT (OGTT is superior to HbA1c in PCOS). * **First-line Management:** Lifestyle modification (weight loss and exercise) is the cornerstone of treatment.

Question 107: Clomiphene citrate is indicated in:

A. Stein-Leventhal syndrome (Correct Answer)
B. Ovarian cyst
C. Asherman's syndrome
D. Carcinoma endometrium

Explanation: **Explanation:** **Clomiphene Citrate (CC)** is a Selective Estrogen Receptor Modulator (SERM) that acts as the first-line treatment for ovulation induction in women with an intact hypothalamic-pituitary-ovarian axis. 1. **Why Stein-Leventhal Syndrome is Correct:** Stein-Leventhal syndrome, commonly known as **Polycystic Ovary Syndrome (PCOS)**, is characterized by chronic anovulation. Clomiphene works by binding to estrogen receptors in the hypothalamus, blocking the negative feedback of endogenous estrogen. This "tricks" the brain into perceiving low estrogen levels, leading to an increased secretion of **GnRH** and subsequently **FSH and LH**. The rise in FSH stimulates follicular growth and triggers ovulation, making it the drug of choice for infertility in PCOS patients. 2. **Why Other Options are Incorrect:** * **Ovarian Cyst:** CC is contraindicated in the presence of an undiagnosed ovarian cyst (except PCOS), as it can cause further enlargement and risk of rupture or torsion due to ovarian hyperstimulation. * **Asherman’s Syndrome:** This involves intrauterine adhesions causing mechanical infertility. Since the pathology is structural (endometrial scarring), hormonal ovulation induction will not result in pregnancy. * **Carcinoma Endometrium:** CC is contraindicated here. Furthermore, long-term unopposed estrogenic effects (often seen in PCOS) are a risk factor for endometrial cancer; CC is used to induce cycles, not treat malignancy. **High-Yield Clinical Pearls for NEET-PG:** * **Mechanism:** Competitive antagonist of estrogen receptors at the hypothalamus. * **Administration:** Usually started on **Day 2 to Day 5** of the menstrual cycle for 5 days. * **Side Effects:** Multiple pregnancies (mostly twins ~8-10%), anti-estrogenic effect on cervical mucus, and **Ovarian Hyperstimulation Syndrome (OHSS)**. * **Hot Flashes:** The most common side effect reported by patients.

Question 108: What is the cut-off point of serum estrogen level for the diagnosis of ovarian failure?

A. 10 pg/mL
B. 20 pg/mL (Correct Answer)
C. 30 pg/mL
D. 40 pg/mL

Explanation: ### Explanation **1. Understanding the Correct Answer (B: 20 pg/mL)** Ovarian failure (Premature Ovarian Insufficiency or Menopause) is characterized by the depletion of the ovarian follicle pool. In a healthy reproductive cycle, follicles produce **Estradiol (E2)**. When the ovaries fail, E2 production drops significantly. The standard clinical cut-off for diagnosing hypoestrogenism associated with ovarian failure is a serum estradiol level **less than 20 pg/mL**. This low level, when coupled with elevated gonadotropins (FSH >40 IU/L), confirms that the negative feedback loop is broken due to primary ovarian dysfunction. **2. Analysis of Incorrect Options** * **A (10 pg/mL):** While levels can certainly drop this low in profound menopause, 10 pg/mL is too restrictive as a diagnostic threshold. Many patients with confirmed ovarian failure will fluctuate between 10–20 pg/mL. * **C & D (30–40 pg/mL):** These levels are considered "low-normal" or early follicular phase levels. While they indicate declining reserve, they do not meet the strict diagnostic criteria for complete ovarian failure or menopause. **3. NEET-PG High-Yield Pearls** * **The Gold Standard:** The most consistent biochemical marker for ovarian failure is **FSH >40 IU/L** (measured on two occasions, 4–6 weeks apart). * **The "Window":** Serum E2 levels can fluctuate in the perimenopausal period; therefore, a single low E2 reading is less reliable than a high FSH reading. * **AMH (Anti-Müllerian Hormone):** This is the earliest and most sensitive marker for declining ovarian reserve, as it is independent of the menstrual cycle. * **Clinical Definition:** Premature Ovarian Insufficiency (POI) is defined as ovarian failure occurring before the age of **40 years**.

Question 109: Normal ovaries are seen in which of the following conditions?

A. Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome (Correct Answer)
B. Turner syndrome
C. Sawyer syndrome
D. Gonadal dysgenesis

Explanation: ### Explanation **Correct Option: A. Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome** **Why it is correct:** MRKH syndrome (Müllerian Agenesis) is characterized by the congenital absence of the uterus and the upper two-thirds of the vagina. Crucially, the **ovaries originate from the primitive germ cells** (yolk sac) and not from the Müllerian ducts. Therefore, in MRKH, ovarian development and function are completely **normal**. Patients present with primary amenorrhea but have normal secondary sexual characteristics (due to intact estrogen production) and a female karyotype (46, XX). **Why other options are incorrect:** * **B. Turner Syndrome (45, XO):** This is a form of hypergonadotropic hypogonadism where accelerated oocyte atresia leads to **"streak ovaries"** (fibrous tissue without follicles). * **C. Swyer Syndrome (46, XY Pure Gonadal Dysgenesis):** Due to a failure in the SRY gene or its pathway, the undifferentiated gonads do not develop into testes. Instead, they remain as non-functional **streak gonads**. * **D. Gonadal Dysgenesis:** This is a broad term for any condition where the gonads fail to develop normally (including Turner and Swyer syndromes), typically resulting in streak gonads rather than functional ovaries. **NEET-PG High-Yield Pearls:** * **MRKH vs. AIS:** In MRKH, the karyotype is **46, XX** and testosterone levels are normal female. In Androgen Insensitivity Syndrome (AIS), the karyotype is **46, XY** and testosterone levels are in the male range. * **Associated Anomalies:** 30–40% of MRKH patients have **renal anomalies** (e.g., renal agenesis, ectopic kidney), so a renal ultrasound is mandatory. * **Hormonal Profile:** In MRKH, FSH, LH, and Estrogen levels are **normal** because the hypothalamic-pituitary-ovarian axis is intact.

Question 110: In galactorrhea-amenorrhea syndrome, what investigation should be advised apart from serum prolactin levels?

A. TSH (Correct Answer)
B. LH
C. Urinary ketosteroids
D. HCG

Explanation: In **Galactorrhea-Amenorrhea Syndrome**, the primary pathology is hyperprolactinemia. While measuring serum prolactin is the first step, checking **TSH** levels is the most critical next investigation. ### Why TSH is the Correct Answer There is a strong physiological link between the thyroid and prolactin. In **Primary Hypothyroidism**, low levels of circulating thyroxine (T4) lead to a compensatory increase in **Thyrotropin-Releasing Hormone (TRH)** from the hypothalamus. * TRH acts as a potent stimulator for both the thyrotrophs (releasing TSH) and the **lactotrophs** in the anterior pituitary. * This results in secondary hyperprolactinemia, leading to galactorrhea and the suppression of GnRH, which causes amenorrhea. * Treating the underlying hypothyroidism with Levothyroxine usually resolves the galactorrhea and restores menses. ### Why Other Options are Incorrect * **LH (B):** While LH may be low or pulsatility may be altered in hyperprolactinemia, it is not a diagnostic tool for the cause of galactorrhea. * **Urinary Ketosteroids (C):** These are markers for adrenal androgens (e.g., in Congenital Adrenal Hyperplasia or adrenal tumors). They are irrelevant to the prolactin axis. * **HCG (D):** While pregnancy is the most common cause of secondary amenorrhea, it typically does not present with galactorrhea (due to high progesterone levels inhibiting milk let-down during pregnancy). ### NEET-PG High-Yield Pearls * **First-line drug** for prolactinoma: **Cabergoline** (Dopamine agonist). * **Most common cause** of pathological hyperprolactinemia: Pituitary Adenoma (Prolactinoma). * **Drug-induced galactorrhea:** Commonly caused by Metoclopramide, Antipsychotics (Risperidone), and Methyldopa (due to dopamine antagonism). * **Visual Field Defect:** Bitemporal hemianopia (due to optic chiasm compression by a macroadenoma).

Practice by Chapter

Hypothalamic-Pituitary-Ovarian Axis

Practice Questions

Disorders of Puberty

Practice Questions

Hirsutism and Virilization

Practice Questions

Primary Ovarian Insufficiency

Practice Questions

Hyperprolactinemia

Practice Questions

Hyperandrogenism

Practice Questions

Metabolic Dysfunction in PCOS

Practice Questions

Neuroendocrine Disorders and Reproduction

Practice Questions

Hormonal Evaluation and Testing

Practice Questions

Ovulation Induction

Practice Questions

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