An official website of the United States government.

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Concept Breadcrumbs

Preferred Term:

menstruation

Definition:
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.
Concept Schemes:
NALT Full
NALT Core
Broader Concept:
Entry Terms:
  • menses
URI:
https://lod.nal.usda.gov/nalt/52112
Download this Concept:
RDF/XMLCreated 2006-01-19, last modified 2014-02-18