Menstrual Disorders Practice Questions

Q: What is the cause of dysmenorrhea?

Decreased progesterone. **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.

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

Increased progesterone levels.. **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.

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

All of the above.. **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).

Q: 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?

Histopathology. **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).

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

Chronic fatigue syndrome. ### 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).

Q: The most common source of vicarious menstruation is:

Nose. **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.

Q: Congenital erosion may reappear at:

Puberty. **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).

Q: Progressive secondary amenorrhea is associated with:

Psychosomatic cause. **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.

Question 1

What is the cause of dysmenorrhea?

Accepted Answer

Decreased progesterone

Answer

Ovulation

Answer

Increased progesterone

Answer

Secretory epithelium

Question 2

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

Accepted Answer

Increased progesterone levels.

Answer

Dysfunctional uterine bleeding.

Answer

Amenorrhea for weeks to months followed by heavy bleeding.

Answer

Availability of arachidonic acid is reduced at the cellular level.

Question 3

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

Accepted Answer

All of the above.

Answer

Diminished prostaglandin synthesis.

Answer

Decreased endometrial fibrinolysis.

Answer

Endometrial atrophy.

Question 4

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?

Accepted Answer

Histopathology

Answer

Hysterectomy

Answer

Progesterone

Answer

Oral contraceptive pills

Question 5

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

Accepted Answer

Chronic fatigue syndrome

Answer

Psychiatric depressive disorder

Answer

Panic disorder

Answer

General anxiety disorder

Question 6

The most common source of vicarious menstruation is:

Accepted Answer

Nose

Answer

Heart

Answer

Lungs

Answer

Kidney

Question 7

All of the following are true about spasmodic dysmenorrhea EXCEPT:

Accepted Answer

Pain present just before menstruation

Answer

Pain present after the day of the menstrual period

Answer

Pain may persist for 12 to 24 hours

Answer

Dyspareunia

Question 8

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

Accepted Answer

Methotrexate

Answer

Oral contraceptive pills (OCPs)

Answer

Progesterone cyclically for three months

Answer

Tranexamic acid

Question 9

Congenital erosion may reappear at:

Accepted Answer

Puberty

Answer

One year of age

Answer

Two years of age

Answer

Five years of age

Question 10

Progressive secondary amenorrhea is associated with:

Accepted Answer

Psychosomatic cause

Answer

Endometriosis

Answer

Uterine anomaly

Answer

None of the above

Menstrual Disorders — MCQs

Menstrual Disorders — MCQs

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