Growth and maturation of Graafian follicle is controlled by ………..

$A$ : The most immediate effect of $FSH$ is the maturation of existing late primary or secondary follicle.
$R$ : $A$ rising level of $FSH$ causes the developing egg within the follicle to complete the first meiotic division to form a secondary oocyte.

Which of the following depicts the site of impantation of blastocyst under normal condition?

Drugs such as Thalidomide taken by woman in first trimester of pregnancy cause all the following malformations in the developing embryo, except

The fluid filled in the blastocoel cavity of blastula is