Decidua

Decidua
Diagrammatic sections of the uterine mucous membrane: A. The non-pregnant uterus. B. Decidua parietalis; the mucous membrane in the pregnant uterus and not beneath the placenta.
Sectional plan of the gravid uterus in the third and fourth month
Identifiers
MeSHD003656
TEE6.0.1.4.0.0.7
FMA85538
Anatomical terminology

The decidua is the modified mucosal lining of the uterus (that is, modified endometrium) that forms every month, in preparation for pregnancy. It is shed off each month when there is no fertilized egg to support.[1] The decidua is under the influence of progesterone. Endometrial cells become highly characteristic. The decidua forms the maternal part of the placenta and remains for the duration of the pregnancy. After birth the decidua is shed together with the placenta.[1]

  1. ^ a b "Definition of DECIDUA". www.merriam-webster.com. Retrieved 25 October 2022.