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Decidualization is required in some mammalian species where embryo implantation and trophoblast cell invasion of the endometrium occurs, also known as hemochorial placentation. This allows maternal blood to come into direct contact with the fetal chorion , a membrane between the fetal and maternal tissues, and allows for nutrient and gas exchange.
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.
Before the fertilized ovum reaches the uterus, the mucous membrane of the body of the uterus undergoes important changes and is then known as the decidua.The thickness and vascularity of the mucous membrane are greatly increased; its glands are elongated and open on its free surface by funnel-shaped orifices, while their deeper portions are tortuous and dilated into irregular spaces.
The process known as decidualization occurs when the endometrium changes both physiologically and morphologically in order to support and maintain an early pregnancy. [21] The final effect of endometrial cell differentiation and lymphoid cell influx is the formation of a tissue that is functionally distinct.
Ectopic decidua are decidual cells found outside inner lining of the uterus. This condition was first described in 1971 by Walker [1] and the name 'ectopic decidua' was coined by Tausig. [2] While ectopic decidua is most commonly seen during pregnancy, it rarely occurs in non-pregnant people, accompanied by bleeding and pain. [citation needed]
The endometrium is the inner epithelial layer, ... In women of reproductive age, two layers of endometrium can be distinguished. ... About 20,000 protein coding genes ...
The mystery is still unravelling, and on Wednesday, a major breakthrough was announced. Researchers say they've now managed to digitally unroll and start reading one of the ancient scrolls.
The cysts can release blood; the endometrial cyst "menstruates" in the lung. Endometrial cells undergo structural changes during the secretory phase of the menstrual cycle, in a process called decidualization. Decidualized pleural endometrial implants can disrupt the pleura and lead to pneumothorax (and hemothorax). [11]