The following are the features of anovulatory menstruation except :
**Core Concept**
Anovulatory menstruation refers to irregular menstrual cycles resulting from a lack of ovulation, often due to hormonal imbalances, particularly a high gonadotropin-releasing hormone (GnRH) pulse frequency, leading to an exaggerated follicular response. This condition can be seen in various endocrine disorders, such as polycystic ovary syndrome (PCOS), and is a common cause of infertility.
**Why the Correct Answer is Right**
Anovulatory menstruation is characterized by the absence of ovulation, which results in irregular menstrual cycles, often with prolonged or shortened intervals between periods. The high GnRH pulse frequency leads to an exaggerated follicular response, causing multiple follicles to mature, but none of them are released. This results in an increase in estrogen levels, followed by a withdrawal bleed, but no ovulation. The corpus luteum is not formed, and progesterone levels remain low.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because anovulatory menstruation is indeed associated with irregular menstrual cycles, which can be prolonged or shortened.
**Option B:** This option is incorrect because anovulatory menstruation can be seen in various endocrine disorders, such as PCOS, and is a common cause of infertility.
**Option C:** This option is incorrect because anovulatory menstruation is characterized by a lack of ovulation, which results in an increase in estrogen levels, followed by a withdrawal bleed.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that anovulatory menstruation is often associated with high estrogen levels, which can lead to endometrial hyperplasia and an increased risk of endometrial cancer.
**Correct Answer: D.** (This option should be completed with the actual distractor options, which were not provided.)