Implantation of the blastocyst into the endometrium results from
A) trophoblast secretion of enzymes and paracrines that initiates the decidual response.
B) blastocoele secretion of paracrines that initiates the decidual response.
C) blastocoele secretion of paracrines that initiates cell cleavage.
D) trophoblast secretion of endocrine hormones that initiates the decidual response.
E) trophoblast secretion of paracrines that initiates cell cleavage.

Question

Quizplus · Accepted Answer

The implantation of the blastocyst into the endometrium is primarily facilitated by the trophoblast cells, which secrete enzymes and paracrine signals. These secretions initiate the decidual response in the endometrium, preparing it for implantation and subsequent pregnancy support.

Implantation of the Blastocyst into the Endometrium Results from