What is the most common cause of secondary amenorrhea?

• A. Pelvic inflammatory disease
• B. Pregnancy
• C. Hormonal imbalance
• D. Menopause

Answer: (B)

The most common cause of secondary amenorrhea is pregnancy. Secondary amenorrhea refers to the absence of menstruation for three consecutive cycles or more in a previously menstruating woman. Pregnancy is a primary reason for this condition because when a woman conceives, hormonal changes prevent the normal menstrual cycle from occurring. The body produces specific hormones, such as human chorionic gonadotropin (hCG), to maintain the pregnancy and suppress ovulation and menstruation.

While other factors, like hormonal imbalances or pelvic inflammatory disease, can lead to secondary amenorrhea, pregnancy remains the top consideration in a reproductive-aged woman presenting with this condition. Menopause, on the other hand, typically signifies the end of a woman's reproductive years and results in permanent amenorrhea rather than secondary amenorrhea.