Reproductive Endocrinology Practice Questions

Q: Vaginal pH before puberty is?

Neutral (around 7). ***Neutral (around 7)*** - Before puberty, the vagina lacks the influence of **estrogen**, which is essential for the colonization of **Lactobacillus** bacteria. - Without Lactobacillus, there is no significant production of lactic acid, resulting in a **neutral pH** environment. *Approximately 6* - A pH of approximately 6 is still slightly acidic but less so than a mature vagina. - This value is not typical for the prepubertal stage, which generally represents an environment without significant acidic production. *Approximately 4.5* - A pH of approximately 4.5 is characteristic of a **healthy, estrogenized adult vagina** where **Lactobacillus** bacteria produce lactic acid. - This acidic environment is crucial for protecting against pathogenic infections and is not found in prepubertal individuals. *Approximately 5* - A pH of approximately 5 is acidic, though less so than the optimal adult vaginal pH. - This value indicates some lactic acid production, which is minimal or absent before the onset of puberty.

Q: What is thelarche?

Hormone-related breast development in girls. ***Hormone-related breast enlargement in girls*** - **Thelarche** specifically refers to the first sign of puberty in girls, which is the **onset of breast development**. - This development is primarily driven by the action of **estrogen** on breast tissue. *Breast development in boys during puberty* - This condition is known as **gynecomastia**, which is distinguishable from thelarche observed in girls. - While also hormone-related, **gynecomastia** often involves an imbalance between estrogen and androgens. *Breast enlargement during pregnancy* - Breast enlargement during pregnancy is a normal physiological change in preparation for lactation, driven by a surge in various hormones like **estrogen, progesterone, and prolactin**. - It is distinct from the initial, puberty-related breast development in girls. *Breast enlargement due to hormonal therapy in postmenopausal women* - This is an induced effect of **exogenous hormones** (e.g., hormone replacement therapy) and not a natural developmental stage like thelarche. - It is a side effect of medication, not the start of puberty.

Q: What is the best method to assess endometrial activity?

Endometrial biopsy. ***Biopsy*** - **Endometrial biopsy** provides direct tissue samples, allowing for histological examination of the endometrial glands and stroma to assess their phase (proliferative, secretory) and underlying pathology. - This method is considered the **gold standard** for accurately determining endometrial activity and diagnosing conditions like hyperplasia or carcinoma. *HSG* - **Hysterosalpingography (HSG)** is primarily used to evaluate the patency of the fallopian tubes and the shape of the uterine cavity, not the functional activity of the endometrium itself. - It involves injecting contrast dye and taking X-rays, which helps identify structural abnormalities but does not provide microscopic details of endometrial tissue. *USG* - **Transvaginal ultrasonography (USG)** measures endometrial thickness and identifies gross structural abnormalities like polyps or fibroids. - While it can suggest the endometrial phase based on thickness, it does not offer the definitive cellular-level detail of endometrial activity that a biopsy provides. *Colposcopy* - **Colposcopy** is a procedure used to visualize the cervix and vagina with a magnified view, primarily for detecting and evaluating abnormal cells that may lead to cervical cancer. - It is **not used** for assessing the endometrial lining or its physiological activity.

Q: A 15-year-old female presents with primary amenorrhea. Her breasts are Tanner stage 4, but she has no axillary or pubic hair. What is the most likely diagnosis?

Complete Androgen Insensitivity Syndrome (CAIS). ***Complete Androgen Insensitivity Syndrome (CAIS)*** - Previously known as **Testicular Feminization Syndrome**, this condition presents with **breast development (due to peripheral conversion of androgens to estrogens)** but **absent pubic/axillary hair** due to **androgen receptor insensitivity**. - Affected individuals are **genetically male (46, XY)** but have a female external phenotype and **no uterus**, leading to **primary amenorrhea**. *Turner's syndrome* - Characterized by **gonadal dysgenesis (streak gonads)**, leading to **absent or rudimentary breast development** and **primary amenorrhea**. - Individuals are typically **45, XO** and often present with short stature and characteristic physical features like a webbed neck. *Mullerian agenesis* - Involves the **agenesis or hypoplasia of the Mullerian ducts**, resulting in an **absent or hypoplastic uterus and vagina**. - Patients have **normal breast and pubic/axillary hair development** because their ovaries are functional and produce hormones. *Premature ovarian failure* - Involves the **cessation of ovarian function before age 40**, leading to **menopausal symptoms** and **amenorrhea**. - However, patients would have initially gone through **normal puberty**, including the development of pubic/axillary hair, which is absent in this case.

Q: A 20-year-old average-weight female complains of oligomenorrhea along with facial hair. Preliminary investigation reveals raised free testosterone levels. Which of the following could be a likely etiology?

PCOD. ***PCOD*** - The triad of **oligomenorrhea**, **hirsutism** (facial hair), and **elevated free testosterone** levels is highly suggestive of **Polycystic Ovarian Disease (PCOD)** [1]. - **PCOD** is characterized by **anovulation**, leading to menstrual irregularities, and **hyperandrogenism** which causes hirsutism [1]. *Idiopathic hirsutism* - While idiopathic hirsutism causes **facial hair** and other androgenic symptoms, it is characterized by **normal androgen levels**, which contradicts the elevated free testosterone in this case. - **Oligomenorrhea** is not a typical feature of idiopathic hirsutism. *Adrenal hyperplasia* - **Adrenal hyperplasia**, particularly **Congenital Adrenal Hyperplasia (CAH)**, can cause hyperandrogenism and menstrual irregularities due to **enzymatic defects** in adrenal steroidogenesis. - However, it typically presents with **markedly elevated 17-hydroxyprogesterone** levels, which are not mentioned here, and often has an earlier onset or more severe virilization. *Testosterone secreting tumour* - A **testosterone-secreting tumor** (e.g., of the ovary or adrenal gland) would cause **sudden-onset**, rapid progression of **severe hirsutism** and **virilization**, often with **very high testosterone levels** [1]. - The gradual onset implied by "complains of" and the average weight of the patient make a tumor less likely than PCOD, though it would need to be ruled out if testosterone levels were extremely high [1].

Q: What does the cornification index indicate in the context of vaginal epithelium?

Estrogenic effect. ***Estrogenic effect*** - The **cornification index** measures the percentage of **superficial cornified squamous cells** in a vaginal smear. - These superficial cells undergo cornification specifically due to **estrogen stimulation**. - A **higher cornification index** indicates greater estrogenic activity on the vaginal epithelium. - This is a key cytological marker used to assess **estrogenic status** in clinical practice. *Progesterone effect* - Progesterone causes **intermediate and parabasal cells** to predominate, not superficial cornified cells. - It results in a **lower cornification index** with folded intermediate cells and increased cellular exfoliation. - The maturation index shifts leftward under progesterone influence. *Effect of LH* - **Luteinizing hormone (LH)** acts on the ovary to trigger ovulation and corpus luteum formation. - LH has **no direct effect** on vaginal epithelial cornification. - The cornification index reflects hormonal effects at the tissue level, not pituitary gonadotropins. *Effect of FSH* - **Follicle-stimulating hormone (FSH)** stimulates ovarian follicle development and estrogen synthesis. - While FSH promotes estrogen production indirectly, the cornification index specifically measures the **direct estrogenic effect** on vaginal cells, not FSH levels. - FSH itself does not cause epithelial cornification.

Q: What should be done next in an 18-year-old girl with primary amenorrhea, a karyotype of 45,X0, and an infantile uterus on ultrasound?

Hormone therapy to induce puberty. ***Hormone therapy to induce puberty*** - The patient has **Turner syndrome (45,X0)**, which causes **gonadal dysgenesis** and thus a lack of **estrogen** and **progesterone** production, leading to primary amenorrhea and an infantile uterus. - **Hormone replacement therapy** with estrogen and progestin is essential to induce secondary sexual characteristics, promote uterine development, and achieve cyclical bleeding, which mimics puberty. *Vaginoplasty* - **Vaginoplasty** is a surgical procedure to create or lengthen the vagina, typically considered for conditions like **Mayer-Rokitansky-Küster-Hauser syndrome** where the vagina is absent or underdeveloped but ovaries are functional. - This patient has an infantile uterus, not vaginal agenesis as the primary issue, and the underlying problem is **hormonal deficiency**, not a structural one that would be addressed by vaginoplasty first. *Clitoroplasty* - **Clitoroplasty** is a surgical procedure to reduce the size of an enlarged clitoris, usually performed in cases of **ambiguous genitalia** or **congenital adrenal hyperplasia**. - There is no indication of clitoromegaly or ambiguous genitalia in this patient's presentation; her primary issue is the absence of puberty. *B/L gonadectomy* - **Bilateral gonadectomy** is indicated in patients with **Y chromosome material** and **gonadal dysgenesis** (e.g., Swyer syndrome or mixed gonadal dysgenesis) due to the high risk of **gonadoblastoma**. - While this patient has **gonadal dysgenesis** associated with **Turner syndrome**, she lacks a **Y chromosome**, meaning the risk of malignant transformation in her streak gonads is low, and therefore prophylactic gonadectomy is not typically performed.

Q: Post-pill amenorrhea is treated by:

Clomiphene. ***Clomiphene*** - **Clomiphene citrate** is a selective estrogen receptor modulator (SERM) that stimulates **gonadotropin-releasing hormone (GnRH)** release, leading to increased FSH and LH. - This effectively induces **ovulation** in women with an intact hypothalamic-pituitary-ovarian axis, which is often the issue in post-pill amenorrhea. *Estrogens* - Administering **estrogens** alone would primarily suppress the hypothalamic-pituitary axis, which is already blunted in post-pill amenorrhea, rather than stimulating ovulation. - While estrogen is part of natural hormone replacement, it does not directly restore **ovarian function** or induce ovulation in this context. *Progesterone* - **Progesterone** is primarily used to induce a withdrawal bleed, confirming the presence of adequate estrogenization, but it does not induce **ovulation**. - It would not address the underlying ovulatory dysfunction characteristic of post-pill amenorrhea. *Clonidine* - **Clonidine** is an alpha-2 adrenergic agonist typically used for **hypertension** or symptoms of menopause like hot flashes. - It has no role in the treatment of **amenorrhea** or in stimulating ovulation.

Question 1

Vaginal pH before puberty is?

Accepted Answer

Neutral (around 7)

Answer

Approximately 6

Answer

Approximately 4.5

Answer

Approximately 5

Question 2

What is thelarche?

Accepted Answer

Hormone-related breast development in girls

Answer

Breast development in boys during puberty

Answer

Breast enlargement during pregnancy

Answer

Breast enlargement due to hormonal therapy in postmenopausal women

Question 3

What is the best method to assess endometrial activity?

Accepted Answer

Endometrial biopsy

Answer

HSG

Answer

USG

Answer

Colposcopy

Question 4

In an amenorrheic patient who has had pituitary ablation for a craniopharyngioma, which of the following regimens is most likely to result in an ovulatory cycle?

Accepted Answer

Human menopausal or recombinant gonadotropin, followed by hCG

Answer

Continuous infusion of GnRH

Answer

Letrozole

Answer

Clomiphene citrate

Question 5

A 15-year-old female presents with primary amenorrhea. Her breasts are Tanner stage 4, but she has no axillary or pubic hair. What is the most likely diagnosis?

Accepted Answer

Complete Androgen Insensitivity Syndrome (CAIS)

Answer

Turner's syndrome

Answer

Premature ovarian failure

Answer

Mullerian agenesis

Question 6

A 20-year-old average-weight female complains of oligomenorrhea along with facial hair. Preliminary investigation reveals raised free testosterone levels. Which of the following could be a likely etiology?

Accepted Answer

PCOD

Answer

Testosterone secreting tumour

Answer

Adrenal hyperplasia

Answer

Idiopathic hirsutism

Question 7

Which of the following statements is true regarding Stein-Leventhal syndrome?

Accepted Answer

It is associated with enlarged ovaries and multiple follicular cysts.

Answer

It is only characterized by oligomenorrhea and amenorrhea.

Answer

It is only characterized by amenorrhea.

Answer

It does not involve ovarian cysts.

Question 8

What does the cornification index indicate in the context of vaginal epithelium?

Accepted Answer

Estrogenic effect

Answer

Progesterone effect

Answer

Effect of LH

Answer

Effect of FSH

Question 9

What should be done next in an 18-year-old girl with primary amenorrhea, a karyotype of 45,X0, and an infantile uterus on ultrasound?

Accepted Answer

Hormone therapy to induce puberty

Answer

Vaginoplasty

Answer

Clitoroplasty

Answer

B/L gonadectomy

Question 10

Post-pill amenorrhea is treated by:

Accepted Answer

Clomiphene

Answer

Clonidine

Answer

Progesterone

Answer

Estrogens

Reproductive Endocrinology — MCQs

Reproductive Endocrinology — MCQs

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