Hormonal Influences on Sexual Function — MCQs
A 30-year-old male presents with erectile dysfunction, low testosterone, and elevated prolactin levels. What is the most likely diagnosis?
35 yr old with 4 months amenorrhea with increased FSH, decreased estrogen. What is the diagnosis?
A 27-year-old female presented to OPD of infertility clinic. She was prescribed bromocriptine. What could be the possible reason?
Which of the following statements regarding prolactin levels is true?
While investigating a case of gynecomastia, all of the following hormone levels are estimated, except:
Which of the following hormones will be affected most after the change in sex hormone binding globulin?
Which of the following is not a clinical feature of hyperprolactinaemia?
A 62-year-old woman presents for annual examination. Her last spontaneous menstrual period was 9 years ago, and she has been reluctant to use postmenopausal hormone replacement because of a strong family history of breast cancer. She now complains of diminished interest in sexual activity. Which of the following is the most likely cause of her complaint?
The menstrual cycle can be best assessed by:
Impotence is a feature of which of the following:
Hormonal Influences on Sexual Function Indian Medical PG Practice Questions and MCQs
Question 1: A 30-year-old male presents with erectile dysfunction, low testosterone, and elevated prolactin levels. What is the most likely diagnosis?
- A. Craniopharyngioma
- B. Testicular failure
- C. Pituitary adenoma (Correct Answer)
- D. Cushing's syndrome
Explanation: Pituitary adenoma - Elevated prolactin levels in a male, coupled with symptoms of hypogonadism (erectile dysfunction, low testosterone), are highly suggestive of a prolactinoma, which is a type of pituitary adenoma [1]. - The prolactinoma suppresses gonadotropin-releasing hormone (GnRH), leading to secondary hypogonadism [1]. Craniopharyngioma - While it is a suprasellar tumor that can affect pituitary function, it typically causes symptoms related to compression of the optic chiasm (visual field defects) [3] and panhypopituitarism, which are not mentioned here. - Hyperprolactinemia is usually due to stalk compression rather than direct prolactin secretion, and other hormone deficiencies are typically more prominent [1]. Cushing's syndrome - Characterized by elevated cortisol levels, leading to symptoms like central obesity, moon facies, and skin changes, which are not described in this patient [4]. - Although it can sometimes be caused by a pituitary tumor (Cushing's disease), the primary hormonal imbalance is cortisol excess, not isolated hyperprolactinemia. Testicular failure - While it causes low testosterone and erectile dysfunction, it would lead to elevated LH and FSH (hypergonadotropic hypogonadism) due to the lack of negative feedback on the pituitary [2]. - Elevated prolactin is not a direct consequence of primary testicular failure.
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
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.
Question 3: A 27-year-old female presented to OPD of infertility clinic. She was prescribed bromocriptine. What could be the possible reason?
- A. Hypogonadotropic hypogonadism
- B. Hyperprolactinemia (Correct Answer)
- C. Pelvic inflammatory disease
- D. Polycystic ovary syndrome
Explanation: ***Hyperprolactinemia*** - **Bromocriptine** is a **dopamine agonist** that effectively reduces elevated prolactin levels, which can cause anovulation and infertility. - High prolactin can inhibit GnRH release leading to impaired follicular development and **infertility**. *Hypogonadotropic hypogonadism* - This condition involves low levels of **gonadotropins (LH and FSH)**, leading to reduced ovarian function. - Treatment typically involves **gonadotropin therapy** (e.g., FSH and LH agonists), not bromocriptine. *Pelvic inflammatory disease* - PID is an infection of the female reproductive organs, often leading to **fallopian tube blockage** and infertility. - Treatment involves **antibiotics** to clear the infection and often surgical correction, not bromocriptine. *Polycystic ovary syndrome* - PCOS is a hormonal disorder characterized by **anovulation**, hyperandrogenism, and polycystic ovaries. - Management often includes **lifestyle modifications**, metformin, clomiphene citrate, or letrozole, not primarily bromocriptine, unless there is co-existing hyperprolactinemia.
Question 4: Which of the following statements regarding prolactin levels is true?
- A. Hyperthyroidism - Increased prolactin
- B. Sleep - Increased prolactin (Correct Answer)
- C. Organic seizure - normal prolactin
- D. Psychogenic seizure - Normal prolactin
Explanation: ***Sleep - Increased prolactin*** - Prolactin secretion is **pulsatile** and highest during **nocturnal sleep**, peaking around 4-5 AM. - This physiological increase occurs regardless of sleep onset and is a normal diurnal rhythm. *Hyperthyroidism - Increased prolactin* - **Hyperthyroidism** typically causes **decreased prolactin levels** due to altered dopaminergic tone and thyroid hormone effects on pituitary lactotrophs. - Conversely, **hypothyroidism**, particularly primary hypothyroidism, can lead to **increased prolactin** due to elevated TRH stimulating prolactin secretion. *Organic seizure - normal prolactin* - An **organic seizure** (e.g., tonic-clonic seizure) usually causes an **acute, significant elevation in prolactin** levels postictally. - This transient rise in prolactin can be a valuable diagnostic marker to differentiate epileptic seizures from non-epileptic events. *Psychogenic seizure - Decreased prolactin* - **Psychogenic non-epileptic seizures (PNES)** typically result in **normal or slightly decreased prolactin** levels after the event. - This is a key diagnostic differentiator from true epileptic seizures, which show postictal prolactin elevation.
Question 5: While investigating a case of gynecomastia, all of the following hormone levels are estimated, except:
- A. Lutenizing hormone
- B. Prolactin
- C. Follicle stimulating hormone (Correct Answer)
- D. None of the options
Explanation: ***Follicle stimulating hormone*** - While **FSH** levels can be assessed in cases of infertility or hypogonadism, they are generally **not a primary assessment** for gynecomastia. - The direct hormonal imbalance causing gynecomastia typically involves other hormones like testosterone, estrogen, LH, and prolactin. *Lutenizing hormone* - **LH** levels are crucial in assessing **gonadal function** and identifying the cause of altered testosterone production, which is directly linked to gynecomastia [1]. - Elevated or suppressed LH can indicate primary or secondary hypogonadism affecting the **testosterone-estrogen balance**. *Prolactin* - **Prolactin** levels are important to rule out **hyperprolactinemia**, which can lead to hypogonadism and subsequently gynecomastia [1]. - A **prolactinoma** (prolactin-secreting tumor) can suppress GnRH, leading to reduced testosterone and an increased estrogen-to-androgen ratio [1]. *None of the options* - This option is incorrect because there is a specific hormone (FSH) among the choices that is **less commonly estimated** in the initial workup for gynecomastia compared to LH and prolactin. - The workup for gynecomastia commonly involves assessment of other hormones like **testosterone** and **estrogen** along with LH and prolactin [1].
Question 6: Which of the following hormones will be affected most after the change in sex hormone binding globulin?
- A. Testosterone (Correct Answer)
- B. Progesterone
- C. DHEA
- D. Estrogen
Explanation: ***Testosterone*** - **Sex hormone-binding globulin (SHBG)** binds primarily to **testosterone** (and dihydrotestosterone) with **high affinity**. - SHBG has approximately **5 times greater affinity** for testosterone compared to estradiol. - A change in SHBG levels will significantly impact the proportion of **free (biologically active) testosterone** available in the circulation, thus affecting its overall function and measurement. - This makes testosterone the hormone **most affected** by changes in SHBG levels. *Progesterone* - **Progesterone** is primarily bound to **albumin** and **corticosteroid-binding globulin (CBG)**, not SHBG. - Therefore, changes in SHBG would have minimal direct impact on progesterone levels or its bioavailability. *DHEA* - **Dehydroepiandrosterone (DHEA)** is mostly bound to **albumin** in the blood. - Its binding to SHBG is negligible, making changes in SHBG irrelevant to its overall circulating levels or activity. *Estrogen* - **Estrogen (estradiol)** also binds to SHBG, but with **significantly lower affinity** than testosterone (approximately 5-fold less). - While affected by SHBG changes, the impact is less pronounced than on testosterone due to the lower binding affinity and its additional binding to albumin.
Question 7: Which of the following is not a clinical feature of hyperprolactinaemia?
- A. Oligomenorrhea
- B. Galactorrhea
- C. Recurrent abortions
- D. Ambiguous genitalia (Correct Answer)
Explanation: ***Ambiguous genitalia*** - **Ambiguous genitalia** refers to a condition where external genitalia do not clearly identify an infant as male or female [4]. This is usually due to **congenital adrenal hyperplasia (CAH)** or other developmental disorders, not hyperprolactinemia [3]. - Hyperprolactinemia primarily affects reproductive function and milk production, not the determination of sex characteristics during fetal development. *Oligomenorrhea* - **Oligomenorrhea** (infrequent menstruation) is a common clinical feature of hyperprolactinemia. Elevated prolactin levels can disrupt the **hypothalamic-pituitary-gonadal axis**, inhibiting GnRH pulsatility and subsequent ovarian function [2]. - This hormonal imbalance leads to irregular or absent menstrual periods [2]. *Galactorrhea* - **Galactorrhea** (inappropriate milk production) is a classic symptom of hyperprolactinemia [1]. Prolactin's primary physiological role is to stimulate milk synthesis [5]. - Pathologically high levels of prolactin result in milk discharge from the breast unrelated to childbirth or nursing [2]. *Recurrent abortions* - Hyperprolactinemia can lead to **recurrent miscarriages** or abortions due to its impact on the menstrual cycle and the potential for a **luteal phase defect**. - High prolactin can interfere with adequate progesterone production needed to maintain an early pregnancy by disrupting follicular development and corpus luteum function [2][5].
Question 8: A 62-year-old woman presents for annual examination. Her last spontaneous menstrual period was 9 years ago, and she has been reluctant to use postmenopausal hormone replacement because of a strong family history of breast cancer. She now complains of diminished interest in sexual activity. Which of the following is the most likely cause of her complaint?
- A. Decreased vaginal length
- B. Untreatable sexual dysfunction
- C. Decreased ovarian function (Correct Answer)
- D. Alienation from her partner
Explanation: ***Decreased ovarian function*** - The woman's age and history of menopause 9 years prior strongly suggest **decreased ovarian function**, leading to **estrogen deficiency**. - **Estrogen deficiency** causes vaginal atrophy, dryness, and dyspareunia, which can significantly diminish interest in sexual activity. *Decreased vaginal length* - While vaginal atrophy can occur with menopause, leading to a narrower and less elastic vagina, a significant "decreased vaginal length" is less common as a primary cause of diminished sexual interest. - The primary physiological change affecting sexual interest due to estrogen loss is **vaginal dryness** and **dyspareunia**, rather than an anatomical change in length. *Untreatable sexual dysfunction* - Postmenopausal sexual dysfunction related to estrogen deficiency is often **treatable** with local vaginal estrogen therapy or other interventions. - Assuming it's untreatable without further assessment is premature and inaccurate, especially given the clear physiological changes associated with menopause. *Alienation from her partner* - While relationship issues can certainly affect sexual interest, the clinical history points to a **physiological cause** (postmenopausal estrogen deficiency). - There is no information in the scenario to suggest alienation from her partner, making this answer less likely than a direct physiological cause.
Question 9: The menstrual cycle can be best assessed by:
- A. Fern test
- B. Spinnbarkeit phenomenon
- C. Sex steroid profile (Correct Answer)
- D. Cytology of endometrium
Explanation: ***Sex steroid profile*** - A **sex steroid profile** directly measures the levels of key hormones like **estrogen** and **progesterone** throughout the cycle, providing the most comprehensive and accurate assessment of ovarian function and phases [2]. - Changes in these hormones dictate the events of the menstrual cycle, including ovulation and endometrial preparation [2]. *Fern test* - The **fern test** assesses cervical mucus crystallization patterns, primarily indicating high estrogen levels, but it doesn't give a full picture of the entire cycle or progesterone influence [1]. - It's mainly used to confirm **rupture of membranes** in pregnancy or indicate the ovulatory phase [1]. *Spinnbarkeit phenomenon* - **Spinnbarkeit phenomenon** refers to the stretchiness of cervical mucus, which primarily indicates high estrogen levels around ovulation [1]. - While useful for ovulation detection, it does not provide a comprehensive assessment of the entire female sexual cycle or hormonal fluctuations [2]. *Cytology of endometrium* - **Endometrial cytology** involves examining cells from the uterine lining, which can show the effects of hormonal exposure but doesn't directly measure hormone levels or provide a dynamic assessment of the entire cycle [3]. - It is more commonly used to detect **abnormal cellular changes**, such as hyperplasia or malignancy.
Question 10: Impotence is a feature of which of the following:
- A. Poliomyelitis
- B. Amyotrophic lateral sclerosis
- C. Meningitis
- D. Multiple sclerosis (Correct Answer)
Explanation: ***Multiple sclerosis*** - **Erectile dysfunction** (impotence) is a common symptom in men with multiple sclerosis, often resulting from **demyelination** in nerve pathways controlling sexual function [1], [2]. - MS can affect various neurological functions, leading to problems with **autonomic nervous system** control, sensation, and motor coordination, all of which can impact sexual health. *Poliomyelitis* - Poliomyelitis primarily affects the **anterior horn cells** of the spinal cord, leading to acute **flaccid paralysis** of muscles. - While it can cause muscle weakness and atrophy, it is not typically associated with chronic impotence or sexual dysfunction as a primary feature. *Amyotrophic lateral sclerosis* - ALS is a progressive neurodegenerative disease affecting **motor neurons**, leading to muscle weakness, atrophy, and spasticity. - It primarily impacts voluntary muscle movement and does not directly cause impotence, although the physical limitations and psychological stress can indirectly affect sexual function. *Meningitis* - Meningitis is an inflammation of the **meninges** (membranes surrounding the brain and spinal cord) caused by infection. - Its symptoms include headache, fever, and neck stiffness, and while severe cases can lead to neurological complications, impotence is not a typical direct consequence.
Want unlimited practice?
Get full access to all questions, explanations, and performance tracking.
Start For Free