Under the influence of the trophoblast, maternal blood vessels in the endometrium break down and form lacunae.

Name: Under the influence of the trophoblast, maternal blood vessels in the endometrium break down and form lacunae.
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The trophoblast secretes enzymes that break down the maternal blood vessels in the endometrium, leading to the formation of lacunae, which are spaces filled with maternal blood. This process is crucial for establishing the maternal-fetal circulation.

Under the Influence of the Trophoblast, Maternal Blood Vessels in the Endometrium