Question

what is the term for a females first menstrual cycle? parturition menarche ovarian cycle leptin

Explanation:

• Parturition refers to childbirth, not related to the first menstrual cycle.
• Menarche is defined as a female's first menstrual cycle, matching the question.
• Ovarian cycle is the cycle of ovarian events (follicular, ovulation, luteal phases), not the first period.
• Leptin is a hormone related to appetite/metabolism, not related to menstruation.

Answer:

B. Menarche