NCIt definition : The normal physiologic discharge through the vagina of blood and mucosal tissues from
the nonpregnant uterus.;
Alternative definition : NCI-GLOSS: Periodic discharge of blood and tissue from the uterus. From puberty until
menopause, menstruation occurs about every 28 days when a woman is not pregnant.; ACC/AHA: The monthly flow of blood from the female genital tract.;
Codes from synonyms : CDR0000410605; CDR0000046297;