The periodic shedding of the ENDOMETRIUM and associated menstrual bleeding in the MENSTRUAL CYCLE of humans and primates. Menstruation is due to the decline in circulating PROGESTERONE, and occurs at the late LUTEAL PHASE when LUTEOLYSIS of the CORPUS LUTEUM takes place.
D005260
Female
Females
D006801
Humans
Members of the species Homo sapiens.
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014621
Vagina
The genital canal in the female, extending from the UTERUS to the VULVA. (Stedman, 25th ed)
Vaginas
D014626
Vaginal Smears
Collection of pooled secretions of the posterior vaginal fornix for cytologic examination.