Menstrual Disorders — MCQs

A 28-year-old woman experiences emotional lability and depression approximately 10 days before her menses. She reports feeling normal once her menstrual bleeding begins. She also describes premenstrual fatigue, bloating, and breast tenderness. What is the most appropriate treatment for this patient?

Q139Medium

A child presents with primary amenorrhea. She has a negative progesterone challenge test but a positive combined estrogen and progesterone test. What is the most likely diagnosis?

Q140Easy

Mittelschmerz pain is:

Menstrual Disorders Indian Medical PG Practice Questions and MCQs

Question 131: Which of the following can be causes of dysfunctional uterine bleeding?

A. Uterine polyp
B. Fibroid
C. Granulosa cell tumor
D. Irregular shedding of endometrium (Correct Answer)

Explanation: **Explanation:** **Dysfunctional Uterine Bleeding (DUB)** is defined as abnormal uterine bleeding in the absence of any detectable organic, systemic, or iatrogenic cause. It is essentially a diagnosis of exclusion and is primarily caused by **hormonal imbalances** affecting the hypothalamic-pituitary-ovarian axis. 1. **Why the Correct Answer (D) is Right:** **Irregular shedding of the endometrium** (Halban’s disease) is a classic example of ovulatory DUB. It occurs due to the persistence of the corpus luteum, leading to prolonged progesterone secretion. This prevents the synchronous shedding of the endometrium, resulting in heavy and prolonged menses (menorrhagia). Because this is a functional/hormonal derangement rather than a structural lesion, it falls under the category of DUB. 2. **Why the Other Options are Incorrect:** * **Uterine Polyp (A) and Fibroid (B):** These are **organic/structural causes** of abnormal uterine bleeding. According to the FIGO **PALM-COEIN** classification, polyps (P) and leiomyomas (L) are structural causes, whereas DUB corresponds to the "COEIN" (Non-structural) side, specifically Ovulatory dysfunction (O) or Endometrial (E). * **Granulosa Cell Tumor (C):** This is a functional ovarian tumor that secretes estrogen. While it causes bleeding, it is considered a **neoplastic/organic cause**, not DUB. **NEET-PG High-Yield Pearls:** * **PALM-COEIN Classification:** Structural (PALM: Polyp, Adenomyosis, Leiomyoma, Malignancy) vs. Non-structural (COEIN: Coagulopathy, Ovulatory, Endometrial, Iatrogenic, Not yet classified). * **DUB** is most common at the extremes of reproductive life (adolescence and perimenopause) and is usually **anovulatory** (80%). * **Irregular Ripening:** Due to poor corpus luteum function (progesterone deficiency), leading to spotting before menses. * **Irregular Shedding:** Due to persistent corpus luteum, leading to prolonged bleeding. Diagnosis is made by D&C on the **5th or 6th day** of the cycle showing secretory endometrium.

Question 132: What is the treatment of choice in a young patient with primary dysmenorrhea?

A. Presacral neurectomy
B. Dilatation
C. Hysterectomy
D. Symptomatic (Correct Answer)

Explanation: **Explanation:** **Primary dysmenorrhea** is defined as painful menstruation in the absence of any identifiable pelvic pathology. It is primarily caused by the excessive production of **Prostaglandin F2α (PGF2α)** in the secretory endometrium, leading to potent uterine contractions and ischemia. **Why "Symptomatic" is the Correct Answer:** Since the condition is functional and not structural, the management is conservative and aimed at symptom relief. * **NSAIDs (First-line):** Drugs like Mefenamic acid or Ibuprofen act as prostaglandin synthetase inhibitors, directly targeting the underlying cause. * **Combined Oral Contraceptive Pills (OCPs):** These are the second-line treatment; they work by inhibiting ovulation and thinning the endometrium, thereby reducing prostaglandin levels. * **General measures:** Reassurance, heat application, and exercise are also effective. **Why Other Options are Incorrect:** * **Presacral Neurectomy (A):** This is a major surgical procedure involving the transection of sympathetic nerves. It is reserved only for severe, intractable cases of secondary dysmenorrhea (like deep infiltrating endometriosis) that fail all medical therapies. * **Dilatation (B):** Cervical dilatation was historically done based on the "obstruction theory," but it is no longer recommended as it provides only temporary relief and carries risks of cervical trauma. * **Hysterectomy (C):** This is a definitive surgical treatment for uterine pathology. It is never indicated in a "young patient" with primary dysmenorrhea, as it results in permanent loss of fertility. **Clinical Pearls for NEET-PG:** * **Timing:** Pain typically starts a few hours before or just at the onset of menses and lasts for 24–48 hours. * **Risk Factor:** It is most common in adolescent girls shortly after the establishment of ovulatory cycles. * **Gold Standard Medical Rx:** NSAIDs started 1–2 days before the expected period.

Question 133: All are used in treating spasmodic dysmenorrhea except?

A. Bromocriptine (Correct Answer)
B. Ibuprofen
C. Mefenamic acid
D. Norethisterone and ethinyl estradiol

Explanation: **Explanation:** Spasmodic (Primary) Dysmenorrhea is characterized by painful uterine contractions caused by the excessive release of **Prostaglandins (PGF2α)** from the secretory endometrium. The management focuses on inhibiting prostaglandin synthesis or suppressing ovulation. **Why Bromocriptine is the correct answer:** **Bromocriptine** is a dopamine agonist used primarily to treat hyperprolactinemia, galactorrhea, and prolactinomas. It has **no role** in the pathophysiology or treatment of dysmenorrhea. In fact, by lowering prolactin, it may theoretically enhance gonadotropin release, which does not alleviate menstrual pain. **Analysis of other options:** * **Ibuprofen & Mefenamic Acid (NSAIDs):** These are the **first-line medical treatments** for spasmodic dysmenorrhea. They act by inhibiting the enzyme cyclooxygenase (COX), thereby reducing the production of prostaglandins that cause uterine hypercontractility. * **Norethisterone and Ethinyl Estradiol (OCPs):** Combined Oral Contraceptive Pills are the treatment of choice for patients who also desire contraception. They work by **inhibiting ovulation** and thinning the endometrial lining, which significantly reduces prostaglandin levels. **High-Yield Clinical Pearls for NEET-PG:** * **Primary Dysmenorrhea:** Usually starts 1–2 years after menarche (once cycles become ovulatory). The pain typically begins just before or at the onset of menses. * **Drug of Choice (DOC):** NSAIDs (specifically Mefenamic acid) are the initial DOC. * **Secondary Dysmenorrhea:** Pain due to pelvic pathology (e.g., Endometriosis, Adenomyosis). Unlike primary dysmenorrhea, the pain often starts several days before menses and persists after the flow stops. * **Other treatments:** Heat application, regular exercise, and in refractory cases, TENS (Transcutaneous Electrical Nerve Stimulation).

Question 134: Which of the following is NOT a cause of primary amenorrhea?

A. Turner's syndrome
B. Kallmann syndrome
C. Asherman's syndrome (Correct Answer)
D. Rokitansky syndrome

Explanation: ### Explanation The key to answering this question lies in distinguishing between **primary amenorrhea** (failure to initiate menstruation) and **secondary amenorrhea** (cessation of established menses). **Why Asherman’s Syndrome is the Correct Answer:** Asherman’s syndrome refers to the formation of intrauterine adhesions (synechiae), typically following trauma to the basal layer of the endometrium (e.g., over-zealous D&C or genital tuberculosis). Because this condition requires a prior uterine insult or an established endometrial lining to "scar down," it is a classic cause of **secondary amenorrhea**. It does not typically present as primary amenorrhea because the anatomical and hormonal pathways for menstruation were initially functional. **Analysis of Incorrect Options:** * **Turner’s Syndrome (45,XO):** The most common cause of primary amenorrhea. It involves gonadal dysgenesis (streak ovaries), leading to hypergonadotropic hypogonadism. * **Kallmann Syndrome:** A form of hypogonadotropic hypogonadism caused by failure of GnRH-producing neurons to migrate. It presents with primary amenorrhea and anosmia. * **Rokitansky Syndrome (MRKH):** Characterized by Müllerian agenesis (absent uterus and upper 2/3 of the vagina) despite a normal 46,XX karyotype and functioning ovaries. It is the second most common cause of primary amenorrhea. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of Primary Amenorrhea:** Turner’s Syndrome. * **Most common cause of Secondary Amenorrhea:** Pregnancy (always rule this out first!). * **Asherman’s Diagnosis:** Hysterosalpingography (HSG) shows "filling defects"; Gold standard is **Hysteroscopy**. * **Progesterone Challenge Test:** Patients with Asherman’s syndrome will have a **negative** withdrawal bleed because the outflow tract/endometrium is obliterated, regardless of estrogen levels.

Question 135: All of the following are causes of primary amenorrhea EXCEPT?

A. MRKH syndrome
B. Sheehan's syndrome (Correct Answer)
C. Kallmann's syndrome
D. Turner's syndrome

Explanation: **Explanation:** The core concept in this question is the distinction between **Primary Amenorrhea** (failure to start menses by age 15 with secondary sexual characteristics or age 13 without) and **Secondary Amenorrhea** (cessation of menses after they have already been established). **Why Sheehan’s Syndrome is the correct answer:** Sheehan’s syndrome is **postpartum pituitary necrosis** caused by severe obstetric hemorrhage and hypotension. Since it occurs as a complication of childbirth, the patient must have been fertile and menstruating previously. Therefore, it is a classic cause of **secondary amenorrhea**, not primary. **Analysis of Incorrect Options (Causes of Primary Amenorrhea):** * **MRKH Syndrome (Müllerian Agenesis):** The most common cause of primary amenorrhea with normal secondary sexual characteristics. It involves congenital absence of the uterus and upper 2/3rd of the vagina. * **Kallmann’s Syndrome:** A form of hypogonadotropic hypogonadism (GnRH deficiency) associated with anosmia. It leads to primary amenorrhea due to failure of the hypothalamic-pituitary-ovarian axis to initiate puberty. * **Turner’s Syndrome (45,XO):** The most common genetic cause of primary amenorrhea. It presents with streak ovaries (gonadal dysgenesis), short stature, and lack of secondary sexual characteristics. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of Primary Amenorrhea:** Turner’s Syndrome (Overall); MRKH (if secondary sexual characteristics are present). * **Most common cause of Secondary Amenorrhea:** Pregnancy (must always be ruled out first). * **Sheehan’s Syndrome Hallmark:** Failure of lactation (due to prolactin deficiency) is often the earliest clinical sign, followed by loss of pubic/axillary hair and secondary amenorrhea.

Question 136: A 25-year-old female presents with infertility. Hysterosalpingogram reveals Asherman's syndrome. What are the likely symptoms?

A. Menorrhagia
B. Oligomenorrhea
C. Polymenorrhea
D. Hypomenorrhea (Correct Answer)

Explanation: **Explanation:** **Asherman’s Syndrome** is characterized by the presence of intrauterine adhesions (synechiae) that typically develop following trauma to the basal layer of the endometrium, most commonly due to over-zealous curettage (D&C) post-abortion or postpartum. **Why Hypomenorrhea is Correct:** The underlying pathology involves the partial or complete obliteration of the uterine cavity by fibrous bands. This leads to a significant reduction in the functional surface area of the endometrium available for shedding during menstruation. Consequently, patients present with **hypomenorrhea** (scanty menses) or **amenorrhea** (absence of menses). In this clinical scenario, the destruction of the endometrial lining explains both the infertility (due to lack of receptive tissue for implantation) and the reduced menstrual flow. **Why Incorrect Options are Wrong:** * **Menorrhagia (Heavy flow):** This is typically seen in conditions that increase the endometrial surface area or vascularity, such as uterine fibroids or adenomyosis—the opposite of Asherman’s. * **Oligomenorrhea (Infrequent cycles):** This usually suggests a hormonal or ovulatory dysfunction (e.g., PCOS). In Asherman’s, the cycle regularity is often maintained, but the *volume* is reduced. * **Polymenorrhea (Frequent cycles):** This refers to cycles occurring at intervals of less than 21 days, which is not a feature of structural intrauterine scarring. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** **Hysteroscopy** (allows both diagnosis and therapeutic adhesiolysis). * **HSG Finding:** Characterized by "filling defects" or a "honeycomb appearance." * **Treatment:** Hysteroscopic adhesiolysis followed by an IUCD or Foley catheter insertion and high-dose estrogen therapy to promote endometrial regrowth. * **Most common cause:** Post-traumatic (D&C), but in India, **Genital Tuberculosis** is a significant non-traumatic cause.

Question 137: Primary amenorrhoea is a feature of all EXCEPT:

A. Turner's syndrome
B. Stein-Leventhal syndrome (Correct Answer)
C. Rokitansky-Kustner-Hauser syndrome
D. Kallman syndrome

Explanation: **Explanation:** The core of this question lies in distinguishing between conditions that typically present with a failure to start menstruation (Primary Amenorrhoea) versus those that cause a cessation of established cycles (Secondary Amenorrhoea). **Why Stein-Leventhal Syndrome (Option B) is the correct answer:** Stein-Leventhal syndrome, commonly known as **Polycystic Ovary Syndrome (PCOS)**, is the most common cause of **secondary amenorrhoea** or oligomenorrhoea. In PCOS, the patient has usually achieved menarche but experiences subsequent cycle irregularities due to chronic anovulation and hyperandrogenism. While rare cases of primary amenorrhoea can occur if the hormonal imbalance is severe from puberty, it is classically defined as a cause of secondary amenorrhoea. **Analysis of Incorrect Options:** * **Turner’s Syndrome (45, XO):** The most common cause of primary amenorrhoea. It involves gonadal dysgenesis (streak ovaries), leading to hypergonadotropic hypogonadism. * **Mayer-Rokitansky-Küster-Hauser (MRKH) Syndrome:** The second most common cause of primary amenorrhoea. It is characterized by Müllerian agenesis (absent uterus and upper 2/3rd of the vagina) despite a normal 46, XX karyotype and normal ovarian function. * **Kallmann Syndrome:** A form of hypogonadotropic hypogonadism caused by failure of GnRH-secreting neurons to migrate. It presents with primary amenorrhoea and anosmia (loss of smell). **High-Yield Clinical Pearls for NEET-PG:** 1. **Most common cause of Primary Amenorrhoea:** Turner’s Syndrome. 2. **Most common cause of Secondary Amenorrhoea:** Pregnancy (always rule this out first). 3. **MRKH vs. AIS:** In MRKH, the karyotype is 46,XX with normal ovaries; in Androgen Insensitivity Syndrome (AIS), the karyotype is 46,XY with undescended testes. Both present with primary amenorrhoea and a blind vaginal pouch. 4. **PCOS Triad:** Hyperandrogenism, Ovulatory dysfunction, and Polycystic ovaries on ultrasound (Rotterdam Criteria).

Question 138: A 28-year-old woman experiences emotional lability and depression approximately 10 days before her menses. She reports feeling normal once her menstrual bleeding begins. She also describes premenstrual fatigue, bloating, and breast tenderness. What is the most appropriate treatment for this patient?

A. Evening primrose oil
B. Vitamin B6
C. Fluoxetine (Correct Answer)
D. Progesterone

Explanation: ### Explanation **Correct Answer: C. Fluoxetine** **Medical Concept:** The patient presents with classic symptoms of **Premenstrual Dysphoric Disorder (PMDD)**, a severe form of Premenstrual Syndrome (PMS) characterized by significant emotional symptoms (lability, depression) and physical symptoms (bloating, breast tenderness) during the luteal phase, which resolve with the onset of menses. The first-line pharmacological treatment for PMDD is **Selective Serotonin Reuptake Inhibitors (SSRIs)** like Fluoxetine. Unlike their use in major depression, SSRIs for PMDD have a rapid onset of action and can be administered either continuously or restricted to the **luteal phase** (starting on day 14 and stopping at the onset of menses). **Analysis of Incorrect Options:** * **A. Evening primrose oil:** Often used for cyclical mastalgia (breast pain), but clinical trials have shown it is no more effective than a placebo for the systemic emotional symptoms of PMDD. * **B. Vitamin B6 (Pyridoxine):** While sometimes used as a complementary therapy for mild PMS, it lacks robust evidence for treating the severe psychological symptoms of PMDD and can cause peripheral neuropathy in high doses. * **C. Progesterone:** Historically used based on the "progesterone deficiency" theory; however, large-scale studies have shown that progesterone supplementation is **not effective** in treating PMDD. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** Requires at least 5 symptoms, including at least one "core" emotional symptom (irritability, mood swings, anxiety, or depression), occurring during the luteal phase. * **First-line:** SSRIs (Fluoxetine, Sertraline, Paroxetine). * **Second-line:** Oral Contraceptive Pills (OCPs), specifically those containing **Drospirenone** (a progestin with anti-mineralocorticoid activity) with a shortened pill-free interval. * **Definitive Treatment:** GnRH agonists (with add-back therapy) or bilateral oophorectomy (last resort).

Question 139: A child presents with primary amenorrhea. She has a negative progesterone challenge test but a positive combined estrogen and progesterone test. What is the most likely diagnosis?

A. Mullerian agenesis
B. Polycystic ovary syndrome
C. Asherman syndrome
D. Prolactinoma (Correct Answer)

Explanation: ### Explanation This question tests the systematic approach to primary amenorrhea using withdrawal bleeding tests. **1. Understanding the Tests:** * **Negative Progesterone Challenge Test (PCT):** No bleeding occurs after giving progesterone. This indicates either **low estrogen levels** (the endometrium was never primed) or an **outflow tract obstruction**. * **Positive Combined Estrogen-Progesterone Test:** Bleeding occurs after giving both hormones. This confirms that the **outflow tract is patent** and the **endometrium is functional**. **Why Prolactinoma is Correct:** A positive combined test localized the defect to the **Hypothalamic-Pituitary-Ovarian (HPO) axis**. A prolactinoma causes hyperprolactinemia, which inhibits GnRH secretion. This leads to low FSH/LH and subsequent **hypoestrogenism**. Because estrogen levels are too low to build the endometrium, the PCT is negative; however, since the uterus is normal, exogenous estrogen/progesterone triggers withdrawal bleeding. **2. Analysis of Incorrect Options:** * **Mullerian Agenesis:** The uterus is absent. Therefore, the combined estrogen-progesterone test would be **negative** (no endometrium to bleed). * **Asherman Syndrome:** Intrauterine synechiae (scarring) obstruct the cavity. Like Mullerian agenesis, the combined test would be **negative**. * **Polycystic Ovary Syndrome (PCOS):** PCOS is characterized by anovulation with **normal or high estrogen** levels. These patients typically have a **positive PCT**. **3. High-Yield Clinical Pearls for NEET-PG:** * **Step 1 in Amenorrhea:** Rule out pregnancy (hCG test). * **Step 2:** Progesterone Challenge (Medroxyprogesterone acetate 10mg for 5-10 days). * **Negative PCT + Positive Combined Test** = HPO Axis failure (Hypogonadotropic Hypogonadism) or Premature Ovarian Failure (Hypergonadotropic Hypogonadism). * **Negative PCT + Negative Combined Test** = Outflow tract obstruction (e.g., Asherman, Mullerian agenesis).

Question 140: Mittelschmerz pain is:

A. Pain during onset of menstrual cycle
B. Pain during the usual time of ovulation in menstrual cycle (Correct Answer)
C. Pain during or at the end of menstrual cycle
D. Pain during menstrual bleeding

Explanation: ### Explanation **Correct Option: B. Pain during the usual time of ovulation in menstrual cycle** **Mittelschmerz** (German for "middle pain") refers to mid-cycle ovulatory pain. It typically occurs around day 14 of a 28-day cycle. The underlying pathophysiology is attributed to: 1. **Follicular Distension:** Rapid growth of the dominant follicle just before ovulation, stretching the ovarian capsule. 2. **Peritoneal Irritation:** Rupture of the follicle releases follicular fluid or a small amount of blood, which irritates the pelvic peritoneum. The pain is usually unilateral (on the side of ovulation), dull or crampy, and lasts from a few minutes to 48 hours. **Why other options are incorrect:** * **Option A & D:** Pain during the onset or during menstrual bleeding is termed **Dysmenorrhea**. Primary dysmenorrhea is caused by prostaglandin-induced uterine contractions, whereas Mittelschmerz is strictly intermenstrual. * **Option C:** Pain at the end of the menstrual cycle is not a characteristic feature of Mittelschmerz. Pain in the late luteal phase is more commonly associated with Premenstrual Syndrome (PMS) or endometriosis. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** It is a diagnosis of exclusion. It must be differentiated from acute appendicitis, ectopic pregnancy, and ovarian torsion. * **Key Feature:** It occurs mid-cycle and is often accompanied by an increase in **cervical mucus** (Spinnbarkeit phenomenon) and a slight rise in basal body temperature. * **Management:** Reassurance and NSAIDs are usually sufficient. Combined Oral Contraceptive Pills (OCPs) can be used to prevent it by suppressing ovulation. * **Sonographic Finding:** May show a small amount of free fluid in the Pouch of Douglas (POD) following follicular rupture.

Practice by Chapter

Normal Menstrual Physiology

Practice Questions

Primary Dysmenorrhea

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Secondary Dysmenorrhea

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Premenstrual Syndrome and PMDD

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Primary Amenorrhea

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Secondary Amenorrhea

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Polycystic Ovary Syndrome

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Abnormal Uterine Bleeding: Classification

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Evaluation of Menstrual Disorders

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Management Approaches to Menstrual Disorders

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