the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause; "the women were sickly and subject to excessive menstruation"; "a woman does not take the gout unless her menses be stopped"--Hippocrates; "the semen begins to appear in males and to be emitted at the same time of life that the catamenia begin to flow in females"--Aristotle 同义词：menses, menstruum, catamenia, period, flow,
Menstruation is the periodic shedding of the uterine lining (endometrium). It starts (menarche) at or before sexual maturity, maturation, in females of certain mammal species, and ceases at or near menopause (commonly considered the end of a female's reproductive life).
例句与用法
1.
Nevertheless , it ' s a perfectly normal menstruation 不过，这只是正常的来月经
2.
Current concepts of the mechanisms of menstruation 月经机制的现代概念
3.
Have you had any pain in this area during your menstruation 你来月经时间时这一部位疼吗？
4.
Women during menstruation will find them in the oral 在防治女性月经期
5.
Wang dong - mei ' s experiences in treating headache during menstruation 王东梅治疗经行头痛经验
6.
My menstruation all the time very accurate 我的月经一直都很准的。
7.
When was your last menstruation 您最后一次月经在什么时候？
8.
Nurse : is your menstruation regular 护士：你的月经准时吗？
9.
If be adolescence normal , if not be , do not move for menstruation 假如是青春期正常,如不是为月经不调
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