When does the human blastocyst implant in the wall of the uterus?
A) within a few hours of fertilization
B) about a day after conception
C) about a week after conception
D) only after all four extraembryonic membranes become established

Question

Quizplus · Accepted Answer

The human blastocyst typically implants in the wall of the uterus about a week after conception. At this stage, the blastocyst has formed and differentiated into the inner cell mass and the trophoblast, and the outer layer of cells of the trophoblast attach to and invade the lining of the uterus. This implantation process is important for the establishment of the placenta and the proper development of the embryo.

When Does the Human Blastocyst Implant in the Wall of the Uterus