Cledoic egg is an adaptation to

Amniotic fluid is found in

$A$ : If both the ovaries are removed after the first trimester of pregnancy, still there would be normal growth of foetus.
$R$ : After first trimester placenta secretes sufficient progesterone

Sperms are released from the seminiferous tubules by the process called .....

By the contraction of spermatic cord the testis of man are not taken to the abdominal cavity. It is due to the following structure

Egg which contains very little amount of yolk are called as