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Medical Definition of Trophoblastic lacuna
1. One of the spaces in the early syncytiotrophoblastic layer of the chorion before the formation of villi; in human embryos maternal blood enters these spaces by the 10th day; with the differentiation of the chorionic villi they become intervillous spaces, sometimes called intervillous lacunae. (05 Mar 2000)
Lexicographical Neighbors of Trophoblastic Lacuna
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