Reproductive Endocrinology Practice Questions

Q: The maturation index on vaginal cytology is a diagnostic method for evaluating the endocrine status of:

Vagina. **Explanation:** The **Maturation Index (MI)** is a clinical tool used to assess the hormonal status of a patient by examining the proportions of three types of cells found in the **vaginal epithelium**: Parabasal, Intermediate, and Superficial cells. **Why Vagina is the correct answer:** The vaginal squamous epithelium is highly sensitive to circulating sex steroids. **Estrogen** promotes the maturation of the epithelium into superficial cells, while **Progesterone** (and androgens) leads to the predominance of intermediate cells. In the absence of these hormones (e.g., prepuberty or menopause), the epithelium remains thin, consisting primarily of parabasal cells. By calculating the ratio (e.g., 0/40/60), clinicians can directly evaluate the endocrine effect on the **vaginal wall**. **Why other options are incorrect:** * **Ovary:** While the MI reflects ovarian function (estrogen/progesterone production), the cytology is performed on cells exfoliated from the vagina, not the ovary itself. * **Uterus:** The uterine lining (endometrium) responds to hormones via histological changes (proliferative vs. secretory phases), but MI specifically utilizes squamous cells from the vaginal vault. * **Cervix:** Although the ectocervix has squamous epithelium, the standard site for MI is the **lateral vaginal wall** (upper third) to avoid contamination with cervical inflammatory cells or mucus. **High-Yield Clinical Pearls for NEET-PG:** * **Shift to the Left:** Predominance of Parabasal cells (seen in Menopause/Atrophic vaginitis). * **Shift to the Right:** Predominance of Superficial cells (seen in high Estrogen states or mid-cycle). * **Mid-zone Shift:** Predominance of Intermediate cells (seen in Pregnancy or Luteal phase). * **Fern Test:** Another bedside test; positive (ferning) indicates Estrogen, negative (beading) indicates Progesterone.

Q: All the following are included in the Rotterdam criteria for Polycystic Ovarian Syndrome (PCOS) diagnosis except?

Weight of the patient. The **Rotterdam Criteria (2003)** is the gold standard for diagnosing Polycystic Ovarian Syndrome (PCOS). To make a diagnosis, at least **two out of the three** following criteria must be present, provided other etiologies (like CAH or Cushing’s) are excluded: 1. **Hyperandrogenism (Option A):** This can be clinical (hirsutism, acne, male-pattern alopecia) or biochemical (elevated serum testosterone/androstenedione). 2. **Oligomenorrhea or Amenorrhea (Option B):** This represents ovulatory dysfunction. Patients typically have 10 cm³). *Note: Updated international guidelines now suggest a threshold of ≥20 follicles if using high-frequency transvaginal probes.* **Why Option D is the correct answer:** While **obesity** and increased weight are frequently associated with PCOS (seen in ~50–70% of cases) and exacerbate insulin resistance, **weight is not a diagnostic criterion**. A patient can be "Lean PCOS" and still meet the Rotterdam criteria. **High-Yield Clinical Pearls for NEET-PG:** * **LH:FSH Ratio:** Classically 3:1, but no longer used for primary diagnosis. * **Gold Standard Investigation:** Transvaginal Ultrasound (TVS). * **Treatment of Choice:** * Infertility: **Letrozole** (First line) > Clomiphene Citrate. * Hirsutism/Irregular cycles: Combined Oral Contraceptive Pills (COCPs). * Metabolic issues: Lifestyle modification and Weight loss (most important initial step). * **AMH Levels:** Often significantly elevated in PCOS due to the high number of pre-antral follicles.

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.

Q: What are the characteristic hormonal changes observed in Polycystic Ovary Syndrome (PCOS)?

High LH, low FSH, and low Estradiol. ### Explanation **1. Why Option C is Correct (The Pathophysiology):** In PCOS, the fundamental endocrine derangement is an **increased frequency of GnRH pulses**, which preferentially stimulates the pituitary to produce **High LH**. This LH excess acts on the ovarian theca cells to produce excess androgens. * **Low/Low-Normal FSH:** The high levels of androgens are peripherally converted to **Estrone (E1)** in adipose tissue. This chronic estrogenic state exerts negative feedback on the pituitary, suppressing FSH. * **Low Estradiol (E2):** Because FSH is low, follicular recruitment is arrested, and the granulosa cells cannot efficiently aromatize androgens into Estradiol. Thus, while "total estrogen" (Estrone) is high, the potent **Estradiol (E2) remains low or at the lower limit of normal.** **2. Why Other Options are Incorrect:** * **Option A (Low Progesterone):** While progesterone is indeed low due to anovulation, it is a *consequence* of the hormonal milieu rather than the primary diagnostic hormonal profile used to characterize PCOS in exams. * **Option B & D:** These do not reflect the classic **LH:FSH ratio (usually >2:1 or 3:1)** seen in PCOS. Normal or low LH/FSH levels would suggest either a normal cycle or hypogonadotropic hypogonadism, respectively. **3. NEET-PG High-Yield Pearls:** * **The "Gold Standard" Ratio:** Look for an **LH:FSH ratio > 2:1**. * **Hyperinsulinemia:** Insulin acts synergistically with LH to increase androgen production and decreases **SHBG (Sex Hormone Binding Globulin)**, leading to more free (active) testosterone. * **Rotterdam Criteria:** Diagnosis requires 2 out of 3: (1) Clinical/Biochemical Hyperandrogenism, (2) Oligo/Anovulation, (3) Polycystic ovaries on USG. * **Estrone (E1) vs. Estradiol (E2):** Remember, PCOS is a state of **Hyperestronemia** (due to peripheral conversion) but not necessarily high Estradiol.

Q: What is true about Polycystic Ovarian Disease (PCOD)?

Hyperinsulinemia. **Explanation:** **Polycystic Ovarian Syndrome (PCOS/PCOD)** is a complex endocrine disorder characterized by hyperandrogenism, ovulatory dysfunction, and polycystic ovarian morphology. **Why Hyperinsulinemia is Correct:** Hyperinsulinemia (and insulin resistance) is a central pathophysiological feature of PCOS, occurring in approximately 50–70% of cases. High levels of insulin act synergistically with **Luteinizing Hormone (LH)** to stimulate the **Theca cells** of the ovary, leading to increased androgen production. Furthermore, insulin suppresses the hepatic synthesis of **Sex Hormone Binding Globulin (SHBG)**, which increases the concentration of free (active) testosterone in the blood. **Analysis of Incorrect Options:** * **Options A, B, & C:** In PCOS, there is typically an **increased LH:FSH ratio**, classically cited as **> 2:1 or 3:1**. This occurs because of an increased frequency of GnRH pulses, which favors LH secretion over FSH. * Option A (LH:FSH > 1:2) and Option B (FSH:LH > 2:1) describe a state where FSH is higher than LH, which is the opposite of the PCOS profile. * Option C (1:1 ratio) is considered normal and not diagnostic of the pathology. **NEET-PG High-Yield Pearls:** * **Rotterdam Criteria (2 out of 3):** 1. Clinical/biochemical hyperandrogenism; 2. Oligo/anovulation; 3. Polycystic ovaries on ultrasound (≥12 follicles or volume >10ml). * **Gold Standard Investigation:** Transvaginal Ultrasound (TVS) showing a "String of Pearls" appearance. * **Biochemical Marker:** Increased **Anti-Müllerian Hormone (AMH)** levels are frequently seen due to the high number of small antral follicles. * **Clinical Sign:** **Acanthosis Nigricans** is a high-yield cutaneous marker of underlying hyperinsulinemia.

Q: In Polycystic Ovary Syndrome (PCOS), increased estrone levels are derived from which precursor?

Androstenedione. **Explanation:** In Polycystic Ovary Syndrome (PCOS), the characteristic hormonal imbalance involves elevated androgens and a state of "unopposed estrogen." The primary source of this estrogen is the **peripheral aromatization** of androgens in adipose tissue. **Why Androstenedione is correct:** In PCOS, the ovaries (and to a lesser extent, the adrenals) overproduce **Androstenedione**. This precursor is converted into **Estrone (E1)** via the enzyme **aromatase**, primarily within peripheral fat cells. Unlike the cyclic production of Estradiol (E2) in a normal menstrual cycle, the chronic elevation of Estrone in PCOS provides constant positive feedback to the pituitary for LH secretion and negative feedback for FSH, contributing to the characteristic high LH:FSH ratio and chronic anovulation. **Analysis of Incorrect Options:** * **Testosterone:** While testosterone is elevated in PCOS, its peripheral aromatization primarily yields **Estradiol (E2)**, not Estrone. * **Dehydroepiandrosterone (DHEA):** DHEA is an upstream weak androgen. While it can eventually be converted to androstenedione, it is not the immediate precursor to estrone. * **GnRH:** This is a peptide hormone produced by the hypothalamus that regulates the release of LH and FSH; it is not a steroid precursor for estrogen. **High-Yield Clinical Pearls for NEET-PG:** * **The "PCOS Estrogen":** Remember that **Estrone (E1)** is the predominant estrogen in PCOS (and menopause), whereas **Estradiol (E2)** is the predominant estrogen in reproductive-age women. * **Endometrial Risk:** Chronic high levels of Estrone lead to endometrial hyperplasia, significantly increasing the risk of **Endometrial Carcinoma**. * **The Vicious Cycle:** Increased insulin (Hyperinsulinemia) decreases **Sex Hormone Binding Globulin (SHBG)**, further increasing the levels of free (active) androgens available for conversion to estrone.

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

Danazol. **Explanation:** The management of hirsutism focuses on reducing circulating androgens or blocking their action at the hair follicle. **Why Danazol is the correct answer (The "Except"):** Danazol is a synthetic steroid and an **isoxazole derivative of ethisterone**. It is primarily used in the treatment of endometriosis and hereditary angioedema. Crucially, Danazol has **strong androgenic properties** and can cause side effects such as weight gain, acne, and **hirsutism** itself. Therefore, it is contraindicated in the management of hirsutism as it would exacerbate the condition. **Analysis of other options:** * **Spironolactone:** This is a potassium-sparing diuretic that acts as a potent **androgen receptor antagonist** and inhibits 5-alpha reductase. It is a first-line agent for idiopathic hirsutism. * **OCPs (Oral Contraceptive Pills):** These are the first-line treatment for PCOS-related hirsutism. They work by suppressing LH (decreasing ovarian androgen production) and increasing **Sex Hormone Binding Globulin (SHBG)**, which lowers free testosterone levels. * **GnRH Agonists:** These are used in severe cases or hyperthecosis. By causing pituitary desensitization, they lead to a profound decrease in ovarian steroidogenesis. **NEET-PG High-Yield Pearls:** * **First-line drug for PCOS-related hirsutism:** OCPs. * **Most common cause of hirsutism:** PCOS (Polycystic Ovary Syndrome). * **Ferriman-Gallwey Score:** Used to clinically quantify hirsutism (Score ≥8 is significant). * **Finasteride:** A 5-alpha reductase inhibitor also used in treatment. * **Eflornithine:** A topical cream used to inhibit hair growth by blocking ornithine decarboxylase.

Question 1

The maturation index on vaginal cytology is a diagnostic method for evaluating the endocrine status of:

Accepted Answer

Vagina

Answer

Ovary

Answer

Uterus

Answer

Cervix

Question 2

All the following are included in the Rotterdam criteria for Polycystic Ovarian Syndrome (PCOS) diagnosis except?

Accepted Answer

Weight of the patient

Answer

Hyperandrogenism

Answer

Amenorrhea or oligomenorrhea

Answer

Polycystic ovaries by ultrasound

Question 3

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 4

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 5

What are the characteristic hormonal changes observed in Polycystic Ovary Syndrome (PCOS)?

Accepted Answer

High LH, low FSH, and low Estradiol

Answer

Low Progesterone

Answer

Normal LH, FSH, and Estradiol

Answer

Low LH, FSH, and Estradiol

Question 6

What is true about Polycystic Ovarian Disease (PCOD)?

Accepted Answer

Hyperinsulinemia

Answer

Luteinizing Hormone (LH) & Follicle-Stimulating Hormone (FSH) Ratio > 1:2

Answer

FSH & LH Ratio > 2:1

Answer

LH & FSH Ratio 1:1

Question 7

In Polycystic Ovary Syndrome (PCOS), increased estrone levels are derived from which precursor?

Accepted Answer

Androstenedione

Answer

Testosterone

Answer

Dehydroepiandrosterone

Answer

Gonadotropin-releasing hormone (GnRH)

Question 8

Which of the following are true about Stein-Leventhal syndrome?

Accepted Answer

Seen in post-menopausal women

Answer

Oligomenorrhea and amenorrhea

Answer

Numerous cysts in ovary

Answer

Theca cell hypertrophy

Question 9

Ovarian senescence is described by all of the following except:

Accepted Answer

Follicular activation is dependent on pituitary stimulation.

Answer

Begins in utero within the embryonic ovary.

Answer

More rapid in the late 30s and early 40s.

Answer

Programmed oocyte atresia.

Question 10

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

Accepted Answer

Danazol

Answer

Spironolactone

Answer

GnRH

Answer

OCPs

Reproductive Endocrinology — MCQs

Reproductive Endocrinology — MCQs

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