In Placental Mammals, Delayed Implantation Usually Occurs When The

Question

In placental mammals, delayed implantation usually occurs when the
A) embryo is at the blastocyst stage.
B) fertilized egg is at the 4-cell stage.
C) embryo is at the trophoblast stage.
D) embryo is in the middle of the placental stage.

Accepted Answer

Delayed implantation typically occurs when the embryo is at the blastocyst stage, allowing it to pause development until conditions are favorable for implantation.