Menstrual Disorders — MCQs

Menstrual Disorders Indian Medical PG Practice Questions and MCQs

Question 51: An 18-year-old college student who has recently become sexually active presents with severe primary dysmenorrhea. She does not want to become pregnant and has not found relief with heating pads or mild analgesics. Which of the following medications is most appropriate for this patient?

A. Prostaglandin inhibitors
B. Narcotic analgesics
C. Oxytocin
D. Oral contraceptives (Correct Answer)

Explanation: ### Explanation **Correct Option: D. Oral Contraceptives** Primary dysmenorrhea is caused by excessive production of **Prostaglandin F2α (PGF2α)** in the secretory endometrium, leading to painful uterine contractions and ischemia. In this patient, Combined Oral Contraceptive Pills (OCPs) are the most appropriate choice because: 1. **Mechanism:** They suppress ovulation and thin the endometrial lining. A thinner endometrium produces significantly less prostaglandins, thereby reducing uterine contractility and pain. 2. **Clinical Context:** The patient is sexually active and desires contraception. OCPs address both the primary dysmenorrhea and her need for birth control, making them the first-line therapy in this scenario. **Analysis of Incorrect Options:** * **A. Prostaglandin inhibitors (NSAIDs):** While these are typically the first-line treatment for primary dysmenorrhea, the question states she has already tried "mild analgesics" without relief. Furthermore, OCPs provide the added benefit of contraception which she specifically requires. * **B. Narcotic analgesics:** These are contraindicated for chronic menstrual pain due to the high risk of dependence and side effects. * **C. Oxytocin:** This would worsen the condition as it stimulates uterine contractions, increasing pain. **NEET-PG High-Yield Pearls:** * **Primary Dysmenorrhea:** Pain usually begins 6–12 months after menarche (once ovulatory cycles are established). It typically starts 1–2 days before or with the onset of menses. * **First-line for non-sexually active:** NSAIDs (e.g., Mefenamic acid, Ibuprofen). * **First-line for sexually active/desiring contraception:** OCPs. * **Secondary Dysmenorrhea:** If pain does not respond to NSAIDs or OCPs, investigate for secondary causes like **Endometriosis** (most common) or Adenomyosis.

Question 52: Spasmodic dysmenorrhea is most commonly associated with which of the following conditions?

A. Endometriosis
B. Dysfunctional uterine bleeding (DUB)
C. Submucous fibroid (Correct Answer)
D. Ovarian cyst

Explanation: **Explanation:** **Spasmodic dysmenorrhea** (also known as primary-like secondary dysmenorrhea) is characterized by sharp, colicky pains in the lower abdomen. The underlying mechanism is the **active contraction of the uterine muscle** attempting to expel a foreign body or mass through the cervical canal. 1. **Why Submucous Fibroid is Correct:** A submucous fibroid acts as an intrauterine "foreign body." When the uterus tries to expel this pedunculated mass (often referred to as a "fibroid in evolution"), it triggers intense, spasmodic myometrial contractions. This mimics the mechanism of labor pains, leading to the classic spasmodic nature of the pain. 2. **Analysis of Incorrect Options:** * **Endometriosis:** Typically associated with **congestive (secondary) dysmenorrhea**. The pain is dull, aching, and begins a few days before menstruation due to pelvic congestion and inflammatory cytokines, rather than spasmodic contractions. * **Dysfunctional Uterine Bleeding (DUB):** Usually characterized by painless, heavy, or irregular bleeding (especially in anovulatory cycles). It does not typically present with spasmodic pain unless large clots are being expelled. * **Ovarian Cyst:** Generally causes chronic pelvic pain or acute pain in cases of torsion/rupture. It does not involve the uterine contractile mechanism required for spasmodic dysmenorrhea. **High-Yield Clinical Pearls for NEET-PG:** * **Primary Dysmenorrhea:** Always spasmodic; occurs in ovulatory cycles due to **PGF2α** excess. Pain starts with the onset of menses. * **Secondary Dysmenorrhea:** Usually congestive. However, **submucous fibroids, endometrial polyps, and cervical stenosis** are specific causes of *spasmodic* secondary dysmenorrhea. * **Treatment of choice for Spasmodic Dysmenorrhea:** NSAIDs (Prostalglandin synthetase inhibitors) like Mefenamic acid.

Question 53: What is the primary treatment for pubertal menorrhagia in a 16-year-old girl with 3 gm% Hb?

A. Dilatation and curettage with blood transfusion
B. Danazol with blood transfusion
C. Progestogen with blood transfusion
D. A combination of estrogen and progesterone with blood transfusion (Correct Answer)

Explanation: **Explanation:** The primary cause of pubertal menorrhagia is an **immature Hypothalamic-Pituitary-Ovarian (HPO) axis**, leading to anovulatory cycles. In the absence of ovulation, there is "unopposed estrogen" action on the endometrium, causing it to become hyperplastic, fragile, and prone to heavy, irregular shedding. **Why Option D is Correct:** In this clinical scenario, the patient is severely anemic (**Hb 3 gm%**), indicating an acute emergency. 1. **Blood Transfusion:** Essential to stabilize the patient and correct life-threatening anemia. 2. **Combined Oral Contraceptives (COCs):** Estrogen promotes rapid "healing" and stabilization of the denuded endometrial surface (hemostasis), while the progestogen stabilizes the stroma. This combination is the most effective medical method to stop acute, heavy bleeding in adolescents. **Analysis of Incorrect Options:** * **Option A (D&C):** Dilatation and Curettage is generally **contraindicated** in virgins/adolescents unless medical management fails or there is a suspicion of malignancy. It carries risks of trauma and Asherman syndrome. * **Option B (Danazol):** While it reduces menstrual loss, it is not used for acute stabilization due to its slow onset and significant androgenic side effects (acne, hirsutism). * **Option C (Progestogen alone):** While progestogens are used for maintenance, they are less effective than COCs in the *acute* phase of heavy bleeding where the endometrial lining is already shedding extensively. **Clinical Pearls for NEET-PG:** * **First-line investigation:** Always rule out **bleeding disorders** (e.g., von Willebrand disease) in any adolescent presenting with menorrhagia from the menarche. * **Management Goal:** The goal is to stabilize the endometrium and regulate the cycle until the HPO axis matures (usually within 2 years of menarche). * **Emergency Hemostasis:** High-dose Estrogen (IV or oral) is the fastest way to stop heavy bleeding by inducing rapid epithelialization.

Question 54: Bleeding from the umbilicus in an adult female during menstruation is suggestive of?

A. Bleeding diathesis
B. Vicarious menstruation (Correct Answer)
C. Persistent urachus
D. Purpura

Explanation: **Explanation:** The correct answer is **Vicarious Menstruation**. **1. Why Vicarious Menstruation is correct:** Vicarious menstruation refers to cyclical bleeding from extragenital sites during the normal menstrual cycle. It occurs due to the increased capillary permeability and fragility caused by high estrogen levels just before menstruation. The most common site is the **nasal mucosa** (epistaxis), but it can also occur from the umbilicus, stomach (hematemesis), lungs (hemoptysis), or skin. In the case of the umbilicus, it is often associated with **endometriosis** (Villar’s nodule), where ectopic endometrial tissue responds to hormonal fluctuations. **2. Why other options are incorrect:** * **Bleeding diathesis & Purpura:** These are systemic coagulation or platelet disorders. While they cause abnormal bleeding (e.g., petechiae, bruising, or menorrhagia), the bleeding is typically not strictly cyclical or synchronized with the menstrual phase. * **Persistent urachus:** This is a congenital anomaly where the connection between the bladder and the umbilicus fails to close. It typically presents with the leakage of **urine** from the umbilicus, not cyclical blood. **3. High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Nasal mucosa (Epistaxis). * **Villar’s Nodule:** Primary umbilical endometriosis; presents as a painful, bluish-purple umbilical swelling that bleeds cyclically. * **Mechanism:** Increased vascular congestion and capillary rupture triggered by the withdrawal of estrogen and progesterone. * **Treatment:** Usually involves hormonal suppression (OCPs, GnRH agonists) or surgical excision of the ectopic tissue.

Question 55: All of the following conditions are associated with primary amenorrhea EXCEPT:

A. Testicular feminization syndrome
B. Stein-Leventhal syndrome (Correct Answer)
C. Turner's syndrome
D. Mayer-Rokitansky-Küster-Hauser syndrome

Explanation: **Explanation:** The correct answer is **Stein-Leventhal syndrome** (Polycystic Ovary Syndrome - PCOS). **1. Why Stein-Leventhal Syndrome is the correct answer:** Stein-Leventhal syndrome is characterized by hyperandrogenism, insulin resistance, and chronic anovulation. While it is a leading cause of **secondary amenorrhea** (cessation of menses after menarche), it is rarely a cause of primary amenorrhea. Patients typically achieve menarche but subsequently develop irregular cycles (oligomenorrhea) or amenorrhea due to hormonal imbalances. **2. Analysis of incorrect options (Causes of Primary Amenorrhea):** * **Testicular Feminization Syndrome (Androgen Insensitivity Syndrome):** These individuals are genotypically male (46, XY) but phenotypically female. Due to androgen receptor resistance, they have a blind vaginal pouch and absent uterus, leading to **primary amenorrhea**. * **Turner’s Syndrome (45, XO):** This is the most common cause of primary amenorrhea. Gonadal dysgenesis leads to "streak ovaries" and accelerated oocyte atresia, resulting in a failure to initiate puberty. * **Mayer-Rokitansky-Küster-Hauser (MRKH) Syndrome:** This involves Müllerian agenesis (congenital absence of the uterus and upper 2/3 of the vagina) in a genotypically and phenotypically normal female (46, XX). It is the second most common cause of **primary amenorrhea**. **Clinical Pearls for NEET-PG:** * **Most common cause of primary amenorrhea:** Turner’s Syndrome (Hypergonadotropic hypogonadism). * **Most common cause of secondary amenorrhea:** Pregnancy (Physiological); PCOS (Pathological). * **Differentiating MRKH vs. AIS:** Both present with primary amenorrhea and absent uterus. However, MRKH has **normal pubic/axillary hair** (46, XX), whereas AIS has **sparse/absent hair** (46, XY).

Question 56: Dysfunctional uterine bleeding is seen in which of the following conditions?

A. Metropathia haemorrhagia (Correct Answer)
B. Polycystic ovary syndrome
C. Endometrial tuberculosis
D. Hypothyroidism

Explanation: **Explanation:** **Metropathia Haemorrhagica** (also known as Schroeder’s Disease) is a classic clinical manifestation of **Dysfunctional Uterine Bleeding (DUB)**. It is characterized by specialized cystic glandular hyperplasia of the endometrium resulting from persistent un-antagonized estrogen. In this condition, a single follicle fails to rupture (no ovulation), leading to the absence of a corpus luteum and progesterone. The endometrium continues to proliferate under estrogenic influence until it outgrows its blood supply, leading to irregular, heavy, and prolonged bleeding. **Analysis of Incorrect Options:** * **Polycystic Ovary Syndrome (PCOS):** While PCOS involves anovulation and can cause abnormal uterine bleeding, it is classified as a systemic endocrine/metabolic disorder rather than "pure" DUB. In exams, Metropathia is the more specific pathological diagnosis for DUB. * **Endometrial Tuberculosis:** This is an organic/infective cause of bleeding (often leading to infertility or menstrual irregularities like oligomenorrhea/amenorrhea). DUB, by definition, occurs in the absence of any detectable organic pelvic pathology. * **Hypothyroidism:** This is a systemic endocrine cause of abnormal bleeding. While it affects the menstrual cycle, it is categorized as a secondary cause rather than primary DUB. **Clinical Pearls for NEET-PG:** * **DUB Definition:** Abnormal bleeding from the uterus in the absence of organic medical or pelvic pathology (e.g., no fibroids, polyps, or infection). * **Metropathia Haemorrhagica Triad:** Amenorrhea (usually 6–8 weeks) followed by heavy painless bleeding and a "Swiss-cheese" appearance of the endometrium on histology. * **Follicle Atresia:** The underlying pathology is the persistence of a Graafian follicle (Amnesic follicle) which fails to ovulate.

Question 57: What is the average blood loss during normal menstruation?

A. 50 mL (Correct Answer)
B. 80 mL
C. 100 mL
D. 120 mL

Explanation: **Explanation:** The average blood loss during a normal menstrual cycle is approximately **35–50 mL**. In clinical practice and for competitive exams like NEET-PG, **50 mL** is considered the standard mean value for a healthy menstruating woman. * **Option A (Correct):** 50 mL is the physiological average. Normal menstruation typically lasts 3–7 days, with the majority of blood loss occurring in the first 48 hours. * **Option B (Incorrect):** 80 mL is the **upper limit of normal**. Menstrual blood loss exceeding 80 mL per cycle is clinically defined as **Menorrhagia** (Heavy Menstrual Bleeding). This threshold is significant because losses above 80 mL often lead to a negative iron balance and subsequent iron-deficiency anemia. * **Options C & D (Incorrect):** 100 mL and 120 mL are well above the physiological average and the diagnostic threshold for menorrhagia. **High-Yield Clinical Pearls for NEET-PG:** 1. **Definition of Normal Menses:** Frequency of 24–38 days, duration of 4–8 days, and volume of 5–80 mL. 2. **Composition:** Menstrual discharge consists of blood, endometrial debris, vaginal epithelium, and cervical mucus. It is characterized by its **non-clotting nature** due to the presence of **plasmin** (fibrinolysin). The appearance of large clots usually indicates a loss exceeding 80 mL. 3. **Objective Measurement:** The "Gold Standard" for measuring blood loss is the **Alkaline Hematin method**, though the **PBAC (Pictorial Blood Loss Assessment Chart)** is more commonly used in clinical settings.

Question 58: Which of the following is a cause of secondary amenorrhea?

A. Pelvic irradiation (Correct Answer)
B. Diabetes
C. Kallmann syndrome
D. Imperforate hymen

Explanation: **Explanation:** **Secondary amenorrhea** is defined as the absence of menses for 3 months in a woman with previously regular cycles, or 6 months in a woman with irregular cycles. **Why Option A is Correct:** **Pelvic irradiation** is a recognized cause of secondary amenorrhea due to **Premature Ovarian Insufficiency (POI)**. The ovaries are highly sensitive to radiation; high doses cause irreversible depletion of the primordial follicle pool and stromal fibrosis. This leads to hypergonadotropic hypogonadism, where the ovaries fail to produce estrogen despite stimulation from the pituitary. **Analysis of Incorrect Options:** * **B. Diabetes:** While uncontrolled diabetes can lead to metabolic stress and hypothalamic dysfunction, it is not a classic or primary cause of amenorrhea in the same way that PCOS or thyroid disorders are. It is generally considered a systemic association rather than a direct cause. * **C. Kallmann Syndrome:** This is a cause of **primary amenorrhea**. It is characterized by hypogonadotropic hypogonadism due to the failure of GnRH-producing neurons to migrate to the hypothalamus, often associated with anosmia. * **D. Imperforate Hymen:** This is a classic cause of **primary amenorrhea** (specifically, pseudoamenorrhea). It presents with cyclic pelvic pain and hematocolpos because the menstrual outflow is obstructed, though the hormonal axis is intact. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of secondary amenorrhea:** Pregnancy (always rule this out first with a UPT). * **Most common pathological cause:** Polycystic Ovary Syndrome (PCOS). * **Asherman Syndrome:** The most common uterine cause of secondary amenorrhea, often following over-zealous curettage. * **Sheehan Syndrome:** Pituitary necrosis post-postpartum hemorrhage, leading to secondary amenorrhea.

Question 59: What is the most common cause of dysfunctional uterine bleeding (DUB)?

A. Anovulatory causes (Correct Answer)
B. Ovulatory causes
C. Coagulopathy
D. Pregnancy-related complications

Explanation: **Explanation:** **Dysfunctional Uterine Bleeding (DUB)** is defined as abnormal uterine bleeding in the absence of any identifiable systemic or structural pathology (e.g., fibroids, polyps, or malignancy). **Why Anovulatory causes are correct:** Anovulation is the most common cause of DUB, accounting for approximately **80-90% of cases**. In anovulatory cycles, the absence of a corpus luteum leads to a lack of progesterone. This results in "unopposed estrogen" stimulation of the endometrium, causing it to become excessively vascular and fragile. Eventually, the endometrium outgrows its blood supply, leading to asynchronous, heavy, and irregular **estrogen breakthrough bleeding**. This is most frequently seen at the extremes of reproductive life (menarche and perimenopause). **Analysis of Incorrect Options:** * **B. Ovulatory causes:** These account for only 10-20% of DUB cases. Bleeding is usually regular but heavy (menorrhagia) due to defects in local endometrial hemostasis (e.g., prostaglandins). * **C. Coagulopathy:** While Von Willebrand disease is a common cause of heavy menstrual bleeding in adolescents, it is a systemic disorder and thus categorized under "Coagulopathy" in the PALM-COEIN classification, not DUB. * **D. Pregnancy-related complications:** These (e.g., ectopic pregnancy, miscarriage) are common causes of abnormal bleeding but are excluded by definition from DUB, which requires a non-pregnant state. **High-Yield Clinical Pearls for NEET-PG:** * **PALM-COEIN:** The FIGO classification has replaced the term DUB with "AUB" (Abnormal Uterine Bleeding). Anovulatory DUB falls under **AUB-O** (Ovulatory dysfunction). * **Drug of Choice:** For acute heavy anovulatory bleeding, **high-dose Estrogen** or Combined Oral Contraceptive Pills (OCPs) are used to stabilize the endometrium. * **Gold Standard Investigation:** For women >35 years with DUB, an **Endometrial Biopsy** is mandatory to rule out endometrial hyperplasia or malignancy.

Question 60: Menorrhagia is defined as blood loss per vagina exceeding which of the following amounts?

A. 80 ml (Correct Answer)
B. 110 ml
C. 150 ml
D. 50 ml

Explanation: **Explanation:** **Menorrhagia** (now clinically referred to under the umbrella of Abnormal Uterine Bleeding or AUB-Heavy Menstrual Bleeding) is objectively defined as cyclic bleeding that is excessive in amount (**>80 ml**) or duration (>7 days) occurring at regular intervals. 1. **Why 80 ml is correct:** The threshold of 80 ml is the gold standard used in medical literature (based on the Hallberg et al. studies). It was determined that women losing more than 80 ml of blood per cycle are at a significantly higher risk of developing iron-deficiency anemia, as this loss exceeds the body's regenerative capacity for iron. 2. **Why other options are incorrect:** * **50 ml:** This is within the normal range of menstrual blood loss (average is 30–40 ml). * **110 ml and 150 ml:** While these amounts certainly constitute menorrhagia, they are not the *defining threshold*. The diagnostic criteria begin at the 80 ml mark. **High-Yield Clinical Pearls for NEET-PG:** * **Measurement:** In clinical practice, the **PBAC (Pictorial Blood Loss Assessment Chart)** is often used to estimate loss, where a score >100 suggests >80 ml loss. * **Terminology Update:** FIGO now recommends the term **"Heavy Menstrual Bleeding" (HMB)** instead of menorrhagia. * **PALM-COEIN:** Remember this FIGO classification for causes of AUB (Polyp, Adenomyosis, Leiomyoma, Malignancy; Coagulopathy, Ovulatory dysfunction, Endometrial, Iatrogenic, Not yet classified). * **First-line Investigation:** Transvaginal Ultrasound (TVS). * **Medical Management:** Levonorgestrel Intrauterine System (LNG-IUS/Mirena) is the gold standard medical treatment for HMB.

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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