First Week of Development
Part of the Illustrated Human Embryology book series (MGPPT, volume 1)
The fertilized ovum, through cleavage, reaches the morula stage. Then, forming a central cavity, it becomes a blastocyst, which implants itself in the uterine mucosa on the 6th day.
KeywordsFallopian Tube Zona Pellucida Uterine Cavity Central Cavity Tubular Secretion
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© Masson and Company 1971