VERB 行经;来月经 When a woman menstruates, a flow of blood comes from her womb. Women menstruate once a month unless they are pregnant or have reached the menopause. 行经;来月经 [formal]
Lean hard-training women athletes may menstruate less frequently or not at all. [VERB]
身材瘦削而且训练艰苦的女运动员行经可能不那么频繁,或者根本不来月经。
menstruation
Menstruation may cease when a woman is anywhere between forty-five and fifty years of age.