| menstruation | <physiology> The cyclic, physiologic discharge through the vagina of blood and mucosal tissues from the nonpregnant uterus, it is under hormonal control and normally recurs, usually at approximately four week intervals, in the absence of pregnancy during the reproductive period (puberty through menopause) of the female of the human and a few species of primates. It is the culmination of the menstrual cycle. (18 Nov 1997) |
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| menstruation-inducing agents | Chemical compounds that induce menstruation either through direct action on the reproductive organs or through indirect action by relieving another condition of which amenorrhoea is a secondary result. (12 Dec 1998) |
| anovulational menstruation | anovular menstruation |
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| retained menstruation | An accumulation of menstrual blood in the vagina. (12 Dec 1998) |
| retrograde menstruation | A flow of menstrual blood back through the fallopian tubes; it sometimes carries with it endometrial cells. Supplementary menstruation, bleeding from the navel or urinary tract due to endometriosis occurring at the time of menstruation. Suppressed menstruation, nonappearance of menstrual bleeding from whatever cause. Vicarious menstruation, bleeding from any surface other than the mucous membrane of the uterine cavity, occurring periodically at the time when the normal menstruation should take place. (05 Mar 2000) |
| nonovulational menstruation | anovular menstruation |