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and invade and destroy the maternal tissues. With this physiologic destructive process, the maternal blood vessels of the endometrium are opened, with the result that the spaces in the trophoblastic network are filled with maternal blood; these spaces communicate freely with one another and become
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of blood (400–500 mL). Much of this blood is returned to the mother with normal uterine contractions; thus, when a woman has a cesarean section, she is liable to lose more blood than a woman who has a vaginal delivery, as the blood from the intervillous space is not pushed back toward her body
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Maternal arteries and veins directly enter the intervillous space after 8 weeks gestation, and the intervillous space will contain about a
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to gain access to nutrition for the fetus, proliferates rapidly and forms a network of branching processes which cover the entire
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Knowledge articles incorporating text from the 20th edition of Gray's
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112:Secondary chorionic villi. Diagrammatic.
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209:from which the fetus gains nutrition.
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100:Primary chorionic villi. Diagrammatic.
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161:Anatomical terminology
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185:is the space between
142:spatium intervillosum
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325:Syncytiotrophoblast
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131:Identifiers
56:introducing
575:Embryology
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447:Blastocoel
229:References
64:March 2018
337:Allantois
426:Placenta
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494:Anatomy
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177:In the
118:Details
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307:Embryo
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