Reproductive Physiology Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Reproductive Physiology. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Reproductive Physiology Indian Medical PG Question 1: Which of the following are useful investigations for diagnosis of unresponsive endometrium as a cause of primary amenorrhoea?
1. Karyotype
2. Progesterone challenge test
3. Hormonal studies
4. Hysterosalpingography
Select the correct answer using the code given below.
- A. 2, 3 and 4
- B. 1, 2 and 3 (Correct Answer)
- C. 1, 2 and 4
- D. 1, 3 and 4
Reproductive Physiology Explanation: ***1, 2 and 3***
- In the workup of primary amenorrhea with suspected **unresponsive endometrium**, a systematic approach is essential to differentiate between end-organ failure and central causes.
- **Karyotyping** is important as chromosomal abnormalities like **Turner syndrome (45,X)** can present with primary amenorrhea due to **gonadal dysgenesis**, leading to hypoestrogenism and thus an endometrium that appears "unresponsive" due to lack of estrogen priming, not intrinsic endometrial pathology.
- **Progesterone challenge test** is a key diagnostic tool: withdrawal bleeding indicates adequate estrogen and a responsive endometrium; **no bleeding despite adequate estrogen** suggests either true endometrial unresponsiveness (Asherman's syndrome, Müllerian agenesis) or estrogen deficiency.
- **Hormonal studies** (FSH, LH, estradiol) are crucial to interpret the progesterone challenge test and distinguish between **hypergonadotropic hypogonadism** (ovarian failure with high FSH/LH), **hypogonadotropic hypogonadism** (low FSH/LH/estrogen), and eugonadal amenorrhea with endometrial factors.
*2, 3 and 4*
- While **hysterosalpingography (HSG)** can visualize structural uterine abnormalities (Asherman's syndrome, Müllerian anomalies), it is typically performed **after** initial hormonal assessment.
- This option excludes **karyotyping**, which is essential in the initial evaluation of primary amenorrhea to rule out chromosomal causes that present with hypoestrogenism and secondary endometrial unresponsiveness.
- The systematic approach starts with hormonal evaluation and progesterone challenge before proceeding to imaging studies.
*1, 2 and 4*
- This option excludes **hormonal studies**, which are fundamental to the diagnostic algorithm.
- Without FSH, LH, and estradiol levels, it is impossible to properly interpret a progesterone challenge test or determine whether the "unresponsive endometrium" is due to estrogen deficiency, ovarian failure, or true endometrial pathology.
- Hormonal studies guide the next steps in investigation and management.
*1, 3 and 4*
- This option excludes the **progesterone challenge test**, which is a simple, cost-effective screening test to assess estrogen status and endometrial responsiveness.
- While HSG provides anatomical information, the progesterone challenge test is typically performed earlier in the diagnostic algorithm to determine if further invasive imaging is warranted.
- A systematic hormonal evaluation with progesterone challenge should precede invasive procedures like HSG.
Reproductive Physiology Indian Medical PG Question 2: 35 yr old with 4 months amenorrhea with increased FSH, decreased estrogen. What is the diagnosis?
- A. Premature ovarian failure (Correct Answer)
- B. Pituitary dysfunction
- C. Hypothalamic dysfunction
- D. Polycystic Ovary Syndrome
Reproductive Physiology Explanation: ***Premature ovarian failure***
- The combination of **amenorrhea** for 4 months in a 35-year-old, with **increased FSH** and **decreased estrogen**, is characteristic of premature ovarian failure, indicating the ovaries are no longer responding to FSH stimulation.
- This condition signifies the cessation of ovarian function before the age of 40, leading to menopausal symptoms and infertility.
*Pituitary dysfunction*
- Pituitary dysfunction might lead to **decreased FSH** (hypogonadotropic hypogonadism) due to insufficient stimulation of the ovaries, not increased FSH.
- In cases of pituitary adenomas, increased prolactin can cause amenorrhea, but FSH would not be elevated in the manner described.
*Hypothalamic dysfunction*
- Hypothalamic dysfunction, such as **functional hypothalamic amenorrhea**, typically presents with **low or normal FSH and LH levels** (hypogonadotropic hypogonadism) due to reduced GnRH pulsatility.
- This condition is often associated with stress, excessive exercise, or low body weight, and would not cause elevated FSH as seen here.
*Polycystic Ovary Syndrome*
- **Polycystic Ovary Syndrome (PCOS)** is characterized by **anovulation**, resulting in amenorrhea or oligomenorrhea, but typically involves **elevated androgens** and a **high LH-to-FSH ratio**, with FSH levels generally normal or low, and estrogen levels often normal or slightly elevated.
- It would not present with simultaneously high FSH and low estrogen, which points to ovarian failure rather than anovulation with intact ovarian reserve.
Reproductive Physiology Indian Medical PG Question 3: A woman undergoing treatment of infertility presents with triplet pregnancy. The most probable drug given to her for treatment of infertility would have been:
- A. Inj GnRH analogue
- B. Clomiphene Citrate
- C. Inj hCG
- D. Inj HMG (Correct Answer)
Reproductive Physiology Explanation: ***Inj HMG***
- **Human menopausal gonadotropin (HMG)**, which contains both **FSH and LH**, stimulates the development of multiple ovarian follicles.
- This increased follicular development, when followed by ovulation, significantly raises the risk of **multiple pregnancies**, including triplets, in women undergoing infertility treatment.
*Inj GnRH analogue*
- **GnRH analogues** are primarily used to suppress natural gonadotropin release and prevent premature ovulation, often as part of controlled ovarian hyperstimulation.
- While used in infertility treatments, their direct action is not typically to induce **multiple ovulation** leading to triplets; rather, they regulate the cycle before other stimulating agents are given.
*Clomiphene Citrate*
- **Clomiphene citrate** is an oral anti-estrogen that works by increasing natural FSH and LH production, leading to the development of one or a few follicles.
- Although it can cause **twin pregnancies** in about 5-10% of cases, the incidence of triplets or higher-order multiples is much lower (less than 1%), making it less likely to be the cause of triplets than HMG.
*Inj hCG*
- **Human chorionic gonadotropin (hCG)** is given to trigger **final oocyte maturation and ovulation** once follicles have reached an appropriate size after stimulation with other agents.
- While essential for ovulation, hCG itself does not stimulate follicular development and therefore isn't the primary drug responsible for the **multiple follicle growth** that leads to triplet pregnancy.
Reproductive Physiology Indian Medical PG Question 4: Which of the following inhibit gonadotropin-releasing hormone pulse secretion?
- A. Prolactin (Correct Answer)
- B. Oxytocin
- C. Thyroxine
- D. Insulin
Reproductive Physiology Explanation: ***Prolactin***
- Elevated levels of **prolactin** inhibit the pulsatile secretion of **gonadotropin-releasing hormone (GnRH)** from the hypothalamus.
- This inhibition leads to decreased production of **luteinizing hormone (LH)** and **follicle-stimulating hormone (FSH)** from the pituitary, ultimately affecting gonadal function.
*Thyroxine*
- **Thyroxine** (thyroid hormone) primarily regulates metabolism and growth, and while it interacts with the reproductive axis, its direct effect is not typically the **inhibition of GnRH pulse secretion**.
- Extreme thyroid dysfunction can indirectly impact reproductive hormones, but it's not the primary mechanism of GnRH inhibition.
*Oxytocin*
- **Oxytocin** is largely involved in **uterine contractions** during labor and **milk ejection** during lactation, and has roles in social bonding.
- It does not directly inhibit the pulsatile release of **GnRH**.
*Insulin*
- **Insulin** is a key hormone in **glucose metabolism** and energy regulation.
- While insulin resistance and hyperinsulinemia can affect reproductive function (e.g., in polycystic ovary syndrome, PCOS), it does not **directly inhibit GnRH pulse secretion**.
Reproductive Physiology Indian Medical PG Question 5: Which of the following is preferred for infertility treatment of a female with increased prolactin levels?
- A. Dopamine
- B. Carbidopa
- C. Cabergoline (Correct Answer)
- D. Bromocriptine
Reproductive Physiology Explanation: ***Cabergoline***
- **Cabergoline** is a **dopamine agonist** that is highly effective in normalizing prolactin levels and restoring fertility in women with hyperprolactinemia.
- It has a **longer half-life** and is generally associated with **fewer side effects** compared to other dopamine agonists, allowing for less frequent dosing (once or twice weekly).
*Dopamine*
- While **dopamine** itself is the natural inhibitor of prolactin secretion, it has a **very short half-life** and cannot be administered orally as a long-term treatment.
- It is typically used as an IV pressor agent in critical care and is not suitable for treating chronic hyperprolactinemia.
*Carbidopa*
- **Carbidopa** is a **decarboxylase inhibitor** used to prevent the peripheral metabolism of levodopa, allowing more levodopa to reach the brain.
- It is primarily used in the treatment of **Parkinson's disease** and has no direct role in lowering prolactin levels.
*Bromocriptine*
- **Bromocriptine** is also a **dopamine agonist** used to treat hyperprolactinemia, but it typically requires **daily dosing** and is associated with a higher incidence of side effects like nausea and dizziness.
- While effective, **cabergoline** is generally preferred due to its better tolerability and convenience.
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