Reproductive Endocrinology — MCQs

Reproductive Endocrinology Indian Medical PG Practice Questions and MCQs

Question 321: Which condition is commonly associated with hirsutism in young women?

A. Cushing's syndrome
B. Polycystic ovary syndrome (Correct Answer)
C. Adrenal hyperplasia
D. Hypothyroidism

Explanation: ***Polycystic ovary syndrome*** - **Hirsutism** in young women is a classic symptom of **PCOS**, driven by **increased androgen production**. - Other common features of PCOS include **menstrual irregularities**, **acne**, and **polycystic ovaries** on ultrasound. *Cushing's syndrome* - While Cushing's syndrome can cause hirsutism due to **glucocorticoid excess**, it is also characterized by features such as **moon facies**, **buffalo hump**, stretch marks, and **central obesity**, which are not universally present in typical hirsutism cases. - It involves **hypercortisolism**, often distinct from the primary androgen excess seen in PCOS. *Adrenal hyperplasia* - **Congenital adrenal hyperplasia (CAH)** can cause hirsutism due to an enzyme deficiency leading to **increased adrenal androgen production**. - However, it often presents at an earlier age with more severe virilization and **ambiguous genitalia** in females at birth, depending on the specific enzyme deficiency. *Hypothyroidism* - Hypothyroidism is typically associated with **dry skin**, **hair loss (alopecia)**, **fatigue**, and **weight gain**, not hirsutism. - It involves a **deficiency in thyroid hormones** and does not directly relate to androgen excess causing terminal hair growth.

Question 322: A 32-year-old woman with polycystic ovary syndrome (PCOS) is experiencing difficulty conceiving. Which hormone imbalance is most likely responsible?

A. Increased FSH
B. Decreased LH
C. Increased androgens (Correct Answer)
D. Decreased estrogens

Explanation: ***Increased androgens*** - In PCOS, **increased androgen levels** (e.g., testosterone) from the ovaries and adrenal glands disrupt follicular development and ovulation, leading to **anovulation** and infertility. - These excess androgens contribute to characteristic PCOS symptoms like **hirsutism** and acne. *Increased FSH* - **FSH (follicle-stimulating hormone)** is typically normal or slightly elevated in PCOS, but its *relative* unbalance with LH (often high LH:FSH ratio) is more significant. - Markedly increased FSH usually indicates **primary ovarian insufficiency** or menopause, which is not the case in PCOS. *Decreased LH* - In PCOS, **luteinizing hormone (LH)** levels are typically **elevated**, not decreased, often leading to an increased LH to FSH ratio. - This elevated LH contributes to increased androgen production from the ovarian theca cells. *Decreased estrogens* - While anovulation can lead to fluctuations, **estrogen levels** in PCOS are generally **normal or even slightly elevated** due to the peripheral conversion of androgens into estrogens. - Persistent moderate estrogen levels, without progesterone surges, contribute to anovulatory cycles.

Question 323: A 15-year-old girl with suspected Turner syndrome presents with primary amenorrhea. What is the best initial investigation?

A. Pelvic ultrasound
B. TSH levels
C. Karyotyping
D. FSH levels (Correct Answer)

Explanation: ***FSH levels*** - In suspected **Turner syndrome** with **primary amenorrhea**, an elevated **FSH (follicle-stimulating hormone)** level would indicate hypergonadotropic hypogonadism, suggesting gonadal failure, which is characteristic of Turner syndrome's streak gonads. - As the **best initial investigation**, FSH is a **cost-effective screening test** that is rapidly available and helps differentiate between central (hypogonadotropic) and peripheral (hypergonadotropic) causes of primary amenorrhea. - An elevated FSH guides the decision to proceed with confirmatory genetic testing like karyotyping. - This stepwise approach (hormonal evaluation → genetic confirmation) is the standard clinical practice in evaluating primary amenorrhea. *Karyotyping* - While **karyotyping** is the definitive diagnostic test for **Turner syndrome** (45,XO or mosaic variants), it is not typically the *initial* investigation in a workup for primary amenorrhea. - As a more expensive and specialized test, karyotyping is usually performed after hormonal evaluation reveals elevated FSH, confirming hypergonadotropic hypogonadism. - In clinical practice, hormonal screening guides the appropriate use of genetic testing. *Pelvic ultrasound* - A **pelvic ultrasound** would assess the presence and development of the uterus and ovaries, and may reveal streak gonads or absent ovarian tissue. - While useful as part of the comprehensive evaluation, it wouldn't directly diagnose the underlying genetic cause or provide the hormonal information needed for initial classification. - Imaging findings need to be correlated with hormonal and genetic testing for definitive diagnosis. *TSH levels* - **TSH (thyroid-stimulating hormone) levels** are used to screen for thyroid disorders, which can cause menstrual irregularities but are not the primary cause of primary amenorrhea in a patient suspected of having **Turner syndrome**. - While thyroid function abnormalities are more common in Turner syndrome patients, TSH is not the most direct initial test for evaluating the primary amenorrhea itself. - Thyroid screening is typically part of the general health assessment in Turner syndrome but does not address the gonadal dysfunction.

Question 324: A 27-year-old woman presents with a history of severe acne vulgaris unresponsive to multiple therapies. She has hirsutism, irregular menses, and obesity. Based on these findings, what is the most likely underlying condition?

A. Polycystic ovary syndrome (PCOS) (Correct Answer)
B. Congenital adrenal hyperplasia
C. Cushing's syndrome
D. Androgen-secreting tumor

Explanation: ***Polycystic ovary syndrome (PCOS)*** - This patient's constellation of **severe acne**, **hirsutism**, **irregular menses**, and **obesity** are classic signs and symptoms of **PCOS**, driven by hormonal imbalances, particularly excess androgens. - PCOS is a common endocrine disorder characterized by **hyperandrogenism** (leading to acne and hirsutism) and **ovulatory dysfunction** (causing irregular menses), often associated with insulin resistance and obesity. *Congenital adrenal hyperplasia* - This condition is typically diagnosed in **infancy or childhood** due to ambiguous genitalia or early signs of androgen excess (e.g., precocious puberty). - While it can cause hirsutism and irregular menses, the late presentation and prominent obesity make it less likely than PCOS. *Cushing's syndrome* - Characterized by **central obesity**, **moon facies**, **buffalo hump**, striae, and hypertension due to chronic high cortisol levels. - While it can cause acne, hirsutism, and menstrual irregularities, the overall clinical picture, particularly the absence of other defining features like striae or prominent hypertension, points away from Cushing's. *Androgen-secreting tumor* - These tumors typically cause a **rapid onset** and **severe progression** of androgenic symptoms (hirsutism, virilization, deepening voice). - The patient's history suggests a more gradual development of symptoms, and tumors are generally associated with significantly higher androgen levels than typically seen in PCOS.

Question 325: Which of the following is a change during puberty that is primarily influenced by estrogen?

A. Hair growth
B. Cervical mucus
C. Vaginal Cornification (Correct Answer)
D. Menstruation

Explanation: ***Vaginal Cornification*** - **Estrogen** causes the vaginal epithelium to thicken and mature, a process called **cornification**, which involves the differentiation of superficial cells. - This change is crucial for maintaining vaginal health and protecting against infections, making it a direct effect of estrogen during puberty. *Hair growth* - **Androgens**, not estrogen, are primarily responsible for the development of **pubic and axillary hair** in both males and females. - While estrogen plays a role in some aspects of female development, it is not the main driver of general hair growth during puberty. *Menstruation* - **Menstruation** is the shedding of the uterine lining, which is influenced by the cyclical rise and fall of both **estrogen and progesterone**. - While estrogen is essential for the proliferation of the endometrium, the actual shedding (menstruation) is triggered by the withdrawal of both hormones, primarily **progesterone**. *Cervical mucus* - The quantity and quality of **cervical mucus** are significantly influenced by **estrogen and progesterone**, changing throughout the menstrual cycle. - **Estrogen** makes mucus thin and watery to facilitate sperm passage, but its production and changes are also heavily dependent on **progesterone** for cyclic variations, making it a combined hormonal effect rather than solely estrogen-driven.

Question 326: Hormone predominantly secreted after 14 days that acts on the endometrium is?

A. Progesterone (Correct Answer)
B. Estrogen
C. LH
D. FSH

Explanation: ***Progesterone*** - After **ovulation** (around day 14 of a typical 28-day cycle), the **corpus luteum** forms and begins secreting large amounts of progesterone. - Progesterone's primary role is to prepare the **endometrium** for potential implantation by making it secretory and vascularized. *Estrogen* - Estrogen levels are highest during the **proliferative phase** (days 1-14), promoting endometrial growth and thickening. - While present after day 14, its predominant role shifts to preparing the uterus, but not as the *main* hormone secreted to support the post-ovulatory endometrium. *LH (Luteinizing Hormone)* - LH is crucial for triggering **ovulation** itself, with a surge occurring just before day 14. - After ovulation, LH levels decrease and its primary role is not direct endometrial modification. *FSH (Follicle-Stimulating Hormone)* - FSH is primarily active in the **follicular phase** (days 1-14), stimulating ovarian follicle growth. - Its levels decrease after ovulation, and it does not directly regulate endometrial changes in the post-ovulatory period.

Question 327: Which of the following is the PRIMARY hormonal factor that influences the development of benign breast disease?

A. Estrogen (Correct Answer)
B. Progesterone
C. Luteinizing hormone
D. Testosterone

Explanation: ***Estrogen*** - **Estrogen** plays a primary role in the proliferation of breast epithelial cells, and sustained or elevated levels are associated with an increased risk of several types of **benign breast disease (BBD)** due to its mitotic effects. - The effects of estrogen on breast tissue, including ductal and lobular development, contribute to the histological changes seen in BBD, such as **fibrosis** and **cystic changes**. *Progesterone* - While progesterone is important for **terminal differentiation** of mammary glands and often mediates some of its effects via estrogen, its role in the *primary* development of BBD is less direct compared to estrogen's proliferative influence. - In some contexts, progesterone may even *counteract* some of the proliferative effects of estrogen, particularly in the later phase of the menstrual cycle. *Luteinizing hormone* - **Luteinizing hormone (LH)** primarily regulates ovarian function, triggering ovulation and the production of progesterone and some estrogen, but it does not directly act on breast tissue as a primary factor in BBD development. - Its effects on breast tissue are indirect, mediated through the sex steroids (estrogen and progesterone) it stimulates. *Testosterone* - **Testosterone** is an androgen and a precursor to estrogen in women, but its direct role in the *development* of benign breast disease is not considered primary; it is more often metabolized into active estrogens which then exert effects. - High levels of androgens can sometimes be associated with specific benign breast conditions, but it is not the main hormonal driver.

Question 328: Which of the following is not typically used in the management of Polycystic Ovary Syndrome (PCOS)?

A. OC pills (Oral Contraceptive Pills)
B. Cyclical progesterone therapy
C. Myoinositol supplementation
D. Danazol (Correct Answer)

Explanation: ***Danazol*** - **Danazol** is a synthetic androgen used primarily for conditions like **endometriosis** and **fibrocystic breast disease** due to its anti-estrogenic and weak androgenic effects. - Its androgenic properties would worsen symptoms like **hirsutism** and **acne** common in PCOS, making it an inappropriate treatment. *OC pills (Oral Contraceptive Pills)* - **OCPs** are a cornerstone of PCOS management, primarily to regulate menstrual cycles, reduce **androgen excess** (hirsutism, acne), and protect the endometrium. - They suppress ovarian androgen production and increase sex hormone-binding globulin (SHBG), which binds free testosterone. *Cyclical progesterone therapy* - This therapy is used in PCOS to induce regular withdrawal bleeds, thereby preventing **endometrial hyperplasia** and reducing the risk of **endometrial cancer**. - It does not address the underlying hormonal imbalances or androgen excess but manages the anovulation-related endometrial effects. *Myoinositol supplementation* - **Myoinositol** is commonly used as a supplement to improve **insulin sensitivity** in women with PCOS. - It can help regulate menstrual cycles and improve ovulatory function, particularly in women with **insulin resistance**.

Question 329: FERNING is due to?

A. Progesterone & sodium chloride
B. HCG
C. Estrogen & sodium chloride (Correct Answer)
D. None of the options

Explanation: ***Estrogen & sodium chloride*** - The ferning pattern observed in cervical mucus is primarily due to the presence of **sodium chloride** crystallizing in a specific pattern under the influence of **estrogen**. - High estrogen levels, typically seen around ovulation, increase the water content and salt concentration in cervical mucus, facilitating this characteristic fern-like crystallization. *Progesterone & sodium chloride* - While **progesterone** is present in cervical mucus, its effect is to create a more viscous, less watery mucus that generally **inhibits ferning**. - Progesterone causes the cervical mucus to become thick and cellular, making the crystalline fern pattern less prominent or absent. *HCG* - **Human Chorionic Gonadotropin (HCG)** is a hormone primarily associated with pregnancy and has no direct role in the phenomenon of ferning in cervical mucus. - HCG's main function is to maintain the corpus luteum and progesterone production during early pregnancy, which would actually suppress ferning. *None of the options* - This option is incorrect because the combination of **estrogen and sodium chloride** is the specific cause of ferning. - The other hormones listed have either an inhibitory effect on ferning or no direct involvement.

Question 330: Which ovarian tumour can present with menorrhagia ?

A. Dermoid cyst
B. Epithelial ovarian cancer
C. Granulosa cell tumour (Correct Answer)
D. Yolk sac tumour

Explanation: ***Granulosa cell tumour*** - This tumour secretes **estrogen**, which can lead to **endometrial hyperplasia** and subsequently cause **menorrhagia** (heavy or prolonged menstrual bleeding). - Its hormonal activity is a key differentiator from other ovarian tumours that typically do not cause such menstrual irregularities. *Dermoid cyst* - Also known as a **mature cystic teratoma**, it is a benign germ cell tumor that rarely causes hormonal disturbances. - While it can present with pelvic pain or a mass, it generally does not directly cause **menorrhagia**. *Epithelial ovarian cancer* - These are the most common type of ovarian cancer, but they typically present with non-specific symptoms such as **abdominal bloating**, **pelvic pain**, or changes in bowel habits. - They are not usually associated with **estrogen production** leading to **menorrhagia**. *Yolk sac tumour* - This is a rare, malignant germ cell tumour that is typically seen in young women and produces **alpha-fetoprotein (AFP)**. - It does not produce hormones that directly cause **menorrhagia** but can lead to rapid tumor growth and abdominal symptoms.

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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