Reproductive Endocrinology Practice Questions

Q: What is the treatment for hypogonadotropic primary amenorrhea?

Gonadotropin therapy. **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.

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

Estrogen. **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).

Q: Clomiphene citrate is indicated in:

Stein-Leventhal syndrome. **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.

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

20 pg/mL. ### 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**.

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

Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome. ### 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.

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

TSH. 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).

Question 1

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

Accepted Answer

FSH/LH ratio

Answer

Prolactin level

Answer

LH, T

Answer

Testosterone, epiandrostenedione

Question 2

What is the treatment for hypogonadotropic primary amenorrhea?

Accepted Answer

Gonadotropin therapy

Answer

Estrogens and progesterone

Answer

Assisted reproductive techniques

Answer

None of the above

Question 3

All of the following are used in the management of endometriosis except?

Accepted Answer

Estrogen

Answer

Progesterone

Answer

Danazol

Answer

GnRH agonist

Question 4

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

Accepted Answer

Kallman syndrome

Answer

Testicular feminization

Answer

Pure gonadal dysgenesis

Answer

Turner syndrome

Question 5

Which of the following is NOT related to granulosa cells?

Accepted Answer

In the first half of the cycle, it has no steroidogenic function

Answer

It has no blood supply

Answer

Granulosa cells produce activin and inhibin

Answer

Estrogen stimulates the proliferation of granulosa cells

Question 6

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.

Accepted Answer

3 out of 5

Answer

2 out of 5

Answer

All five

Answer

Any one of these is enough for diagnosis

Question 7

Clomiphene citrate is indicated in:

Accepted Answer

Stein-Leventhal syndrome

Answer

Ovarian cyst

Answer

Asherman's syndrome

Answer

Carcinoma endometrium

Question 8

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

Accepted Answer

20 pg/mL

Answer

10 pg/mL

Answer

30 pg/mL

Answer

40 pg/mL

Question 9

Normal ovaries are seen in which of the following conditions?

Accepted Answer

Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome

Answer

Turner syndrome

Answer

Sawyer syndrome

Answer

Gonadal dysgenesis

Question 10

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

Accepted Answer

TSH

Answer

LH

Answer

Urinary ketosteroids

Answer

HCG

Reproductive Endocrinology — MCQs

Reproductive Endocrinology — MCQs

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