/ˈmɛnstrʊəl/
connected with the time when a woman menstruates each month 月经的
adjective
The average length of a woman’s menstrual cycle is 28 days.
妇女的平均月经周期是 28 天。
menstrual blood
经血
(formal)
a menstrual period
月经
noun
menstruation
the process or time of menstruating 行经；月经来潮