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menstruation (menses, menstrual period)

The cyclic flow of uterine bleeding that normally recurs at about 4 week intervals in the absence of pregnancy in reproductive-age females. See menstrual cycle.

Related

menopause menorrhagia menstrual (estrous) cycle menstrual disorder

General

physiologic process

References

  1. Dorland's Medical Dictionary, 23rd ed., WB Saunders, Philadelphia, 1990