$A$ : 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

The amniotic fluid is taken out with the help of surgical needle and separation of the embryo cells present in this fluid is done by

Internal ear develops from

The foetal membrane which is the source of first blood corpuscle to enter the circulation of the embryo is called

Each epididymis consists of a single tightly coiled tube whose length is about