True or False: The menstrual cycle is characterized by a rise and fall of hormones, with menstruation triggered by falling progesterone levels indicating that pregnancy has not occurred.

• A. True
• B. False
• C. Depends on individual cases
• D. Not enough information

Answer: (A)

The statement is true. The menstrual cycle is a complex process that involves a series of hormonal fluctuations. During the cycle, levels of hormones such as estrogen and progesterone rise and fall at various stages. After ovulation, if fertilization does not occur, progesterone levels will decrease. This drop in progesterone is crucial, as it signals the body to initiate menstruation, marking the shedding of the uterine lining. Understanding this hormonal interplay is essential in grasping how the menstrual cycle operates, particularly in relation to fertility and reproductive health.