Menstrual Disorders — MCQs

Menstrual Disorders Indian Medical PG Practice Questions and MCQs

Question 121: What is the cause of dysmenorrhea?

A. Ovulation
B. Decreased progesterone (Correct Answer)
C. Increased progesterone
D. Secretory epithelium

Explanation: **Explanation:** The primary cause of primary dysmenorrhea is the **withdrawal of progesterone** at the end of the luteal phase. When fertilization does not occur, the corpus luteum regresses, leading to a sharp decline in progesterone levels. This drop triggers the release of **Prostaglandin F2α (PGF2α)** from the lysosomal enzymes of the degenerating secretory endometrium. PGF2α is a potent vasoconstrictor and myometrial stimulant, leading to uterine hypercontractility, ischemia, and the characteristic cramping pain. **Analysis of Options:** * **B. Decreased progesterone (Correct):** The fall in progesterone is the physiological trigger that initiates the prostaglandin cascade responsible for uterine contractions. * **A. Ovulation:** While primary dysmenorrhea occurs only in ovulatory cycles (as progesterone is only produced post-ovulation), ovulation itself is not the direct cause of the pain; the subsequent hormonal withdrawal is. * **C. Increased progesterone:** High levels of progesterone actually have a relaxing effect on the myometrium (progestational effect). Pain occurs only when these levels fall. * **D. Secretory epithelium:** While the secretory endometrium (formed under the influence of progesterone) is the source of prostaglandins, the presence of the epithelium alone does not cause pain until the progesterone levels drop and breakdown begins. **NEET-PG High-Yield Pearls:** * **Gold Standard Treatment:** NSAIDs (e.g., Mefenamic acid) are the first-line treatment as they are COX inhibitors that decrease prostaglandin synthesis. * **Secondary Dysmenorrhea:** If pain begins 3–5 days before menses or persists after menses, suspect **Endometriosis** (most common cause of secondary dysmenorrhea). * **Risk Factors:** Early menarche, long menstrual periods, and smoking are associated with increased severity.

Question 122: All of the following are characteristic of anovulatory uterine (AUB-O) bleeding except:

A. Dysfunctional uterine bleeding.
B. Amenorrhea for weeks to months followed by heavy bleeding.
C. Availability of arachidonic acid is reduced at the cellular level.
D. Increased progesterone levels. (Correct Answer)

Explanation: **Explanation:** In **Anovulatory Uterine Bleeding (AUB-O)**, the fundamental pathology is the absence of ovulation, which leads to a lack of corpus luteum formation. Without a corpus luteum, there is no production of **progesterone**. This results in "unopposed estrogen" action on the endometrium, causing it to proliferate continuously without the stabilizing effect of progesterone. Eventually, the endometrium outgrows its blood supply, leading to asynchronous breakdown and heavy, irregular bleeding (estrogen breakthrough bleeding). Therefore, **increased progesterone levels** are never seen; rather, progesterone is characteristically absent or low. **Analysis of Options:** * **A. Dysfunctional uterine bleeding (DUB):** Historically, DUB was defined as abnormal bleeding in the absence of organic pelvic pathology, most commonly caused by anovulation. While the FIGO classification now prefers "AUB-O," the terms are often used interchangeably in exams. * **B. Amenorrhea followed by heavy bleeding:** This is the classic clinical presentation. Unopposed estrogen causes prolonged endometrial buildup (amenorrhea/delayed menses) followed by a heavy, painless collapse of the thickened tissue. * **C. Reduced arachidonic acid:** In anovulatory cycles, the lack of progesterone leads to lower levels of arachidonic acid and altered prostaglandin ratios (PGE2 vs. PGF2α) in the endometrium, contributing to abnormal vascular tone and bleeding. **NEET-PG High-Yield Pearls:** * **Most common cause of AUB-O:** Polycystic Ovary Syndrome (PCOS). * **Age groups:** Most common at the extremes of reproductive life (adolescence and perimenopause) due to immature or failing HPO axis. * **Histology:** Typically shows proliferative or hyperplastic endometrium; never secretory (as secretory changes require progesterone). * **Treatment of choice:** Cyclic progestins or Combined Oral Contraceptive Pills (COCPs) to stabilize the endometrium.

Question 123: What is the mechanism of action of combination oral contraceptive pills in the treatment of abnormal uterine bleeding (AUB)?

A. Diminished prostaglandin synthesis.
B. Decreased endometrial fibrinolysis.
C. Endometrial atrophy.
D. All of the above. (Correct Answer)

Explanation: **Explanation:** Combined Oral Contraceptive Pills (COCPs) are a first-line medical management for Abnormal Uterine Bleeding (AUB), particularly AUB-O (Ovulatory dysfunction) and AUB-E (Endometrial). Their efficacy is derived from a multi-modal impact on the endometrium: 1. **Endometrial Atrophy (Option C):** The primary mechanism is the delivery of a potent progestin which antagonizes the proliferative effect of estrogen. This leads to a state of endometrial decidualization followed by significant atrophy. A thinner, stable endometrium results in reduced menstrual blood loss (MBL). 2. **Diminished Prostaglandin Synthesis (Option A):** COCPs suppress ovulation and limit endometrial growth. This reduces the production of arachidonic acid and subsequent inflammatory prostaglandins (PGF2α and PGE2) within the uterine lining. Lower prostaglandin levels decrease uterine contractions and vasoconstriction-related pain. 3. **Decreased Endometrial Fibrinolysis (Option B):** COCPs help stabilize the endometrial vascular bed and modulate the local fibrinolytic environment, preventing the premature breakdown of clots during menstruation. Since all three mechanisms contribute to the reduction of menstrual flow and cycle regulation, **Option D** is the correct answer. **Clinical Pearls for NEET-PG:** * **MBL Reduction:** COCPs can reduce menstrual blood loss by approximately 40-50%. * **First-line choice:** For acute AUB, high-dose COCPs (tapering dose) are used to achieve "medical curettage." * **Contraindications:** Always screen for the "WHO Medical Eligibility Criteria" (e.g., history of DVT, migraine with aura, or smoking in women >35 years) before prescribing COCPs for AUB. * **Alternative:** The Levonorgestrel Intrauterine System (LNG-IUS) is considered even more effective than COCPs for long-term management of AUB-L (Leiomyoma) and AUB-A (Adenomyosis).

Question 124: A 45-year-old lady presented with dysfunctional uterine bleeding. On transvaginal ultrasound, the endometrial thickness was found to be 8 mm. What should be the next step in the management of this patient?

A. Histopathology (Correct Answer)
B. Hysterectomy
C. Progesterone
D. Oral contraceptive pills

Explanation: **Explanation:** The primary objective in a perimenopausal woman (age >40 years) presenting with Abnormal Uterine Bleeding (AUB) is to **exclude endometrial hyperplasia or malignancy**. **Why Histopathology is correct:** In women over 40 years of age, any change in menstrual pattern or dysfunctional bleeding is considered a high-risk factor for endometrial carcinoma. According to standard protocols, an **endometrial thickness (ET) >4 mm** in postmenopausal women or persistent AUB in perimenopausal women (regardless of ET, though 8 mm is significantly thickened) necessitates an endometrial biopsy. Histopathology via **Pipelle biopsy or D&C** is the gold standard to obtain a definitive tissue diagnosis before initiating medical or surgical therapy. **Why other options are incorrect:** * **Hysterectomy:** This is a definitive surgical treatment and should never be performed without a prior histological diagnosis to rule out malignancy, which would require a different surgical staging approach. * **Progesterone/OCPs:** While hormonal therapy is used to manage dysfunctional bleeding, it should only be started **after** malignancy has been ruled out. Starting hormones blindly can mask the symptoms of underlying cancer and delay diagnosis. **Clinical Pearls for NEET-PG:** * **Cut-off for Postmenopausal bleeding:** ET >4 mm requires biopsy. * **Age Criterion:** Any woman **>40 years** with AUB must undergo endometrial sampling as the first-line investigation. * **Gold Standard for AUB diagnosis:** Hysteroscopy-guided biopsy (more accurate than blind D&C). * **Most common cause of AUB in perimenopause:** Anovulatory cycles (due to waning follicular function).

Question 125: Which of the following is NOT considered a differential diagnosis for premenstrual tension?

A. Psychiatric depressive disorder
B. Panic disorder
C. General anxiety disorder
D. Chronic fatigue syndrome (Correct Answer)

Explanation: ### Explanation **Premenstrual Syndrome (PMS)** and **Premenstrual Dysphoric Disorder (PMDD)** are characterized by the cyclic recurrence of physical and psychological symptoms during the **luteal phase** of the menstrual cycle, which resolve completely with the onset of menses. **1. Why Chronic Fatigue Syndrome (CFS) is the correct answer:** The hallmark of PMS/PMDD is its **cyclicity**. Differential diagnoses must include conditions that mimic these cyclic mood or physical changes. **Chronic Fatigue Syndrome** is a persistent, non-cyclic condition characterized by debilitating exhaustion lasting for at least 6 months, regardless of the menstrual cycle phase. While PMS may involve lethargy, CFS does not follow the predictable luteal-phase pattern required for a PMS diagnosis. **2. Why the other options are incorrect:** * **Psychiatric Depressive Disorder (A), Panic Disorder (B), and General Anxiety Disorder (C):** These are the most common differential diagnoses. Many women with underlying psychiatric disorders experience **"Premenstrual Exacerbation" (PME)**, where their baseline symptoms worsen before menses. Distinguishing between a primary psychiatric disorder and PMDD requires a symptom-free interval during the follicular phase, documented via prospective daily charting for at least two cycles. **3. NEET-PG High-Yield Pearls:** * **Gold Standard Diagnosis:** Prospective daily charting of symptoms for **two consecutive cycles** (e.g., using the Daily Record of Severity of Problems - DRSP). * **Timing:** Symptoms must occur in the 5 days before menses and remit within 4 days of onset. * **First-line Treatment:** Lifestyle modifications and **SSRIs** (Fluoxetine, Sertraline). SSRIs can be given continuously or strictly during the luteal phase. * **Definitive Treatment:** Bilateral Salpingo-oophorectomy (BSO) to eliminate the hormonal cycle (reserved for severe, refractory cases).

Question 126: The most common source of vicarious menstruation is:

A. Heart
B. Lungs
C. Nose (Correct Answer)
D. Kidney

Explanation: **Explanation:** **Vicarious Menstruation** is a rare clinical condition characterized by cyclical bleeding from extragenital sites during the normal menstrual cycle. This phenomenon occurs due to the response of extra-uterine tissues to the fluctuating levels of estrogen and progesterone, leading to increased vascular permeability and capillary fragility. **Why the Nose is the Correct Answer:** The **nasal mucosa** is the most common site for vicarious menstruation (epistaxis). This is because the nasal mucous membrane contains erectile tissue that is highly sensitive to ovarian hormones. During the premenstrual phase, high estrogen levels cause congestion and hyperemia of the nasal mucosa, making it prone to bleeding synchronized with the menstrual period. **Analysis of Incorrect Options:** * **Lungs (B):** While cyclical hemoptysis can occur (often associated with thoracic endometriosis), it is less common than nasal involvement. * **Heart (A) and Kidney (D):** These are extremely rare sites for vicarious menstruation. While hematuria (Kidney) can occur if there is endometriosis of the urinary tract, it does not represent the "most common" source in clinical practice. **High-Yield Clinical Pearls for NEET-PG:** * **Definition:** Bleeding from an extragenital site at the time of menstruation. * **Most Common Site:** Nasal mucosa (Epistaxis). * **Other Sites:** Skin (bloody sweat), lungs (hemoptysis), eyes (bloody tears/lacrimation), and stomach (hematemesis). * **Pathophysiology:** Often associated with **endometriosis** at the respective site, though it can occur in the absence of demonstrable endometriosis due to hormonal effects on local vasculature. * **Treatment:** Usually involves hormonal suppression (OCPs or GnRH agonists) to stabilize the endometrium and systemic vasculature.

Question 127: All of the following are true about spasmodic dysmenorrhea EXCEPT:

A. Pain present just before menstruation (Correct Answer)
B. Pain present after the day of the menstrual period
C. Pain may persist for 12 to 24 hours
D. Dyspareunia

Explanation: **Explanation:** Spasmodic dysmenorrhea (Primary Dysmenorrhea) is characterized by painful uterine contractions caused by the release of **Prostaglandin F2α (PGF2α)** from the secretory endometrium. **Why Option A is the correct answer (The Exception):** In spasmodic dysmenorrhea, the pain typically **begins with the onset of menstrual flow** or just a few hours before it. Pain that is present significantly before menstruation (premenstrual) is more characteristic of **Congestive Dysmenorrhea** (Secondary), which is associated with pelvic inflammatory disease or endometriosis. Therefore, "pain present just before menstruation" is the false statement in this context. **Analysis of other options:** * **Option B:** Pain usually subsides within 24–48 hours, but it can occasionally linger slightly after the first day as prostaglandin levels peak and then decline. * **Option C:** The typical duration of spasmodic pain is **12 to 24 hours**, coinciding with the maximum shedding of the endometrium. * **Option D:** While dyspareunia is a classic symptom of *secondary* dysmenorrhea (like endometriosis), it is generally **absent** in pure spasmodic (primary) dysmenorrhea. However, in the context of this specific MCQ structure, Option A is the most definitive "Except" because the timing of pain is the primary clinical differentiator. **High-Yield Clinical Pearls for NEET-PG:** * **Patient Profile:** Usually seen in young, nulliparous girls; starts shortly after menarche once ovulation is established. * **Mechanism:** High PGF2α causes uterine hypercontractility and ischemia. * **Treatment:** **NSAIDs** (Mefenamic acid) are the first-line treatment as they are prostaglandin synthetase inhibitors. Combined Oral Contraceptive Pills (COCPs) are used if NSAIDs fail or if contraception is desired. * **Key Differentiator:** Primary dysmenorrhea **improves after childbirth** (vaginal delivery) due to the destruction of adrenergic nerve endings in the isthmus.

Question 128: Which of the following is NOT an evidence-based treatment for menorrhagia?

A. Oral contraceptive pills (OCPs)
B. Progesterone cyclically for three months
C. Tranexamic acid
D. Methotrexate (Correct Answer)

Explanation: **Explanation:** The correct answer is **Methotrexate**. Menorrhagia (Heavy Menstrual Bleeding) is defined as excessive menstrual blood loss which interferes with a woman's physical, social, emotional, and/or material quality of life. **Why Methotrexate is the correct answer:** Methotrexate is a folate antagonist and a cytotoxic drug. It is primarily used in the management of ectopic pregnancy, gestational trophoblastic neoplasia, and certain autoimmune conditions (like rheumatoid arthritis). It has **no role** in the management of menorrhagia and can actually cause bone marrow suppression, leading to thrombocytopenia and potentially *worsening* bleeding. **Analysis of other options:** * **Oral Contraceptive Pills (OCPs):** These are a first-line medical management for menorrhagia. They work by inducing endometrial atrophy and inhibiting ovulation, reducing menstrual blood loss by approximately 40-50%. * **Cyclic Progesterone:** While less effective than the Levonorgestrel-IUS, oral progestogens administered in the luteal phase (or for 21 days) help regulate the cycle and stabilize the endometrium, particularly in cases of anovulatory bleeding. * **Tranexamic Acid:** This is a non-hormonal antifibrinolytic agent. It works by preventing the breakdown of fibrin clots in the endometrial vasculature. It is highly effective and taken only during menstruation. **High-Yield Clinical Pearls for NEET-PG:** * **First-line treatment (Medical):** Levonorgestrel-releasing Intrauterine System (LNG-IUS/Mirena) is considered the "Gold Standard" medical treatment, reducing blood loss by up to 90%. * **First-line (Non-hormonal):** Tranexamic acid is the preferred choice for women desiring pregnancy. * **Surgical Management:** Endometrial ablation or Hysterectomy are considered when medical management fails or is contraindicated. * **FIGO Classification:** Use the **PALM-COEIN** acronym to categorize causes (Polyp, Adenomyosis, Leiomyoma, Malignancy; Coagulopathy, Ovulatory dysfunction, Endometrial, Iatrogenic, Not yet classified).

Question 129: Congenital erosion may reappear at:

A. One year of age
B. Two years of age
C. Five years of age
D. Puberty (Correct Answer)

Explanation: **Explanation:** **Congenital erosion** (also known as congenital ectopy) is a physiological condition where the columnar epithelium of the endocervix extends onto the vaginal portion of the cervix (ectocervix). 1. **Why Puberty is Correct:** The development and maintenance of the cervical columnar epithelium are highly dependent on **estrogen**. In utero, maternal estrogen crosses the placenta, stimulating the fetal cervix and often resulting in "congenital erosion" at birth. After birth, as maternal estrogen levels plummet, the erosion typically heals or regresses. It **reappears at puberty** because the endogenous production of estrogen by the maturing ovaries stimulates the proliferation and outward extension of the endocervical mucosa once again. 2. **Why Other Options are Incorrect:** * **One, Two, and Five years of age:** During these periods (the "juvenile" or "quiescent" phase), estrogen levels in a child are extremely low. Without estrogenic stimulation, the squamocolumnar junction remains retracted within the endocervical canal, making the reappearance of erosion clinically impossible during early childhood. **High-Yield Clinical Pearls for NEET-PG:** * **Definition:** Cervical erosion is not a true "ulcer"; it is the replacement of squamous epithelium by columnar epithelium. * **Etiology:** The three main physiological states associated with erosion are **Newborn period** (maternal estrogen), **Puberty**, and **Pregnancy/OCP use** (high estrogen states). * **Treatment:** Congenital erosion is physiological and usually asymptomatic; it requires no treatment unless it persists or becomes infected (cervicitis). * **Transformation Zone:** This is the area where columnar epithelium undergoes squamous metaplasia; it is the most common site for cervical intraepithelial neoplasia (CIN).

Question 130: Progressive secondary amenorrhea is associated with:

A. Endometriosis
B. Psychosomatic cause (Correct Answer)
C. Uterine anomaly
D. None of the above

Explanation: **Explanation:** **Understanding the Correct Answer (B):** Secondary amenorrhea is defined as the absence of menses for more than 6 months in a woman who previously had regular cycles. **Psychosomatic causes** (such as severe emotional stress, anxiety, depression, or eating disorders like anorexia nervosa) are classic triggers for **Hypothalamic Amenorrhea**. The underlying mechanism involves a disruption of the pulsatile release of **Gonadotropin-Releasing Hormone (GnRH)** from the hypothalamus. This leads to decreased secretion of FSH and LH, resulting in anovulation and low estrogen levels. The term "progressive" refers to the clinical course where cycles initially become irregular (oligomenorrhea) before ceasing entirely as the psychological stressor persists or worsens. **Analysis of Incorrect Options:** * **A. Endometriosis:** This condition typically presents with **progressive secondary dysmenorrhea** (painful periods) and infertility, rather than amenorrhea. In fact, patients with endometriosis usually have regular, often heavy, menstrual cycles. * **C. Uterine Anomaly:** Structural anomalies (e.g., Mullerian agenesis) are usually causes of **primary amenorrhea**. While acquired uterine conditions like Asherman Syndrome can cause secondary amenorrhea, they are typically sudden (post-procedure) rather than "progressive" in the psychosomatic sense. **NEET-PG High-Yield Pearls:** * **Most common cause of secondary amenorrhea:** Pregnancy (Always rule this out first with a Beta-hCG test). * **Female Athlete Triad:** Disordered eating, amenorrhea, and osteoporosis (a specific type of psychosomatic/functional hypothalamic amenorrhea). * **Progestin Challenge Test:** In psychosomatic amenorrhea, the patient will typically have a **negative** withdrawal bleed if estrogen levels have dropped significantly due to prolonged GnRH suppression.

Practice by Chapter

Normal Menstrual Physiology

Practice Questions

Primary Dysmenorrhea

Practice Questions

Secondary Dysmenorrhea

Practice Questions

Premenstrual Syndrome and PMDD

Practice Questions

Primary Amenorrhea

Practice Questions

Secondary Amenorrhea

Practice Questions

Polycystic Ovary Syndrome

Practice Questions

Abnormal Uterine Bleeding: Classification

Practice Questions

Evaluation of Menstrual Disorders

Practice Questions

Management Approaches to Menstrual Disorders

Practice Questions

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