The fertilized egg divides by the process of

Ovum receives the sperm in the region of

Identify the human developmental stage shown below as well as the related right place of its occurrence in a normal pregnant woman,and select the right option for the two,together.

Incomplete cleavage is a type of which division?

In the blastocyst,the blastomeres are arranged into an outer layer called _ $A$ _ and an inner group of cells attached to the trophoblast,called _ $B$ _.

In which layer of the uterus does implantation occur?