Which of the following is known as the anti-abortion hormone?

The hormone responsible for the implantation of the embryo in the uterus and the formation of the placenta is:

The best definition of the process of gastrulation is that it is a process where the

Match List-$I$ with List-$II$ related to embryonic development at various months of pregnancy:

List-$I$	List-$II$
$A$. The foetus movement starts and hair appears on the head	$I$. $24$ weeks of pregnancy
$B$. The foetus develops limbs and digits	$II$. $20$ weeks of pregnancy
$C$. The foetus develops external genital organs	$III$. $8$ weeks of pregnancy
$D$. The foetus body is covered with fine hair; eyelids separate and eyelashes are formed	$IV$. $12$ weeks of pregnancy

Choose the correct answer from the options given below:

The pattern of cleavage in an egg is determined by which of the following?

What is the reproductive nature of humans?