Which is a TRUE statement about implantation of a blastocyst?

A. It occurs at the same time as, and is caused by, the LH surge.
B. When it occurs outside the uterus, it is called a myopic pregnancy.
C. It is a result of digestion of myometrial cells by enzymes in the trophoblast.
D. It occurs at a time in the cycle when plasma estrogen concentration is higher than progesterone concentration.
E. It normally occurs midway through the luteal phase.


Answer: E

Anatomy & Physiology

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