DUB is due to :
**Core Concept**
Dysfunctional Uterine Bleeding (DUB) is a condition characterized by abnormal uterine bleeding in the absence of organic pathology, accounting for a significant proportion of gynecological consultations. This condition is often associated with hormonal imbalances, particularly related to the luteal phase defect or anovulatory cycles.
**Why the Correct Answer is Right**
The correct answer is related to the underlying hormonal cause of DUB. In anovulatory cycles, the corpus luteum does not form, leading to inadequate progesterone production. This hormonal imbalance disrupts the normal endometrial growth and shedding, resulting in irregular and heavy menstrual bleeding. The lack of progesterone also prevents the endometrium from preparing for a potential pregnancy, contributing to the development of DUB.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not address the hormonal imbalance associated with DUB. Although infections can cause abnormal uterine bleeding, they are not the primary cause of DUB.
**Option B:** This option is incorrect as it refers to a condition that is often associated with DUB, but is not the underlying cause. Endometrial polyps or fibroids can cause abnormal bleeding, but they are not the primary reason for DUB.
**Option C:** This option is incorrect as it does not accurately describe the hormonal cause of DUB. Anovulatory cycles are the primary cause of DUB, not a result of estrogen dominance.
**Clinical Pearl / High-Yield Fact**
A key aspect of managing DUB is to identify and address the underlying hormonal imbalance. Treatment options may include hormonal contraceptives, progesterone therapy, or other medications that regulate menstrual cycles and alleviate symptoms.
**Correct Answer: A. Anovulatory cycles are the primary cause of DUB.**