decidua

American  

[dih-sij-oo-uh] / dɪˈsɪdʒ u ə /

noun

Embryology.

plural

deciduas, deciduae

1. the endometrium of a pregnant uterus that in many of the higher mammals is cast off at parturition.

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decidua British  

/ dɪˈsɪdjʊə /

noun

1. the specialized mucous membrane that lines the uterus of some mammals during pregnancy: is shed, with the placenta, at parturition

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Other Word Forms

• decidual adjective

Etymology

Origin of decidua

1775–85; < New Latin, noun use of feminine of Latin dēciduus falling; deciduous

Example Sentences

The research showed that the decidua, the layer of the uterine lining that forms during pregnancy, and blood vessels, are sending different signals to the placenta when a pregnant person has placenta accreta.

From Science Daily • Jan. 30, 2024

The maternal portion of the placenta develops from the deepest layer of the endometrium, the decidua basalis.

From Textbooks • Jun. 19, 2013

Playfair speaks of the detachment of the uterine decidua without the interruption of pregnancy.

From Anomalies and Curiosities of Medicine by Pyle, Walter L. (Walter Lytle)

It has been thought that the decidua of a particular menstrual period is related, not to the ovum discharged at that period, but to the ovum discharged at the preceding period.

From The Four Epochs of Woman's Life; a study in hygiene by Galbraith, Anna M. (Anna Mary)

The umbilical cord goes from its navel to the placenta. b amnion, c chorion, d placenta, d apostrophe, relics of villi on smooth chorion, f internal or reflex decidua, g external or true decidua.

From The Evolution of Man — Volume 1 by Haeckel, Ernst Heinrich Philipp August