During gastrulation ....... is formed

Enzyme present in sperm acrosome to dissolve egg membrane is

$A$ : After menopause the levels of blood gonadotropins will rise markedly.
$R$ : At the time of menopause all the ovarian follicles are converted into follicular atresia and the ovaries are not responding to the gonadotropins

Coelom is found between the cavity of

Normally the gametes are disease free in human beings or even in other animals because

The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?