Menstrual Cycle — definition

1. menstrual cycle (Noun)

menstrual cycle (Noun) — A recurring cycle (beginning at menarche and ending at menopause) in which the endometrial lining of the uterus prepares for pregnancy; if pregnancy does not occur the lining is shed at menstruation. ex. "the average menstrual cycle is 28 days"

cycle oscillation fertile period fertile phase luteal phase menstrual phase safe period secretory phase