By the end of which week of pregnancy is the body of the fetus covered with fine hair,eyelids separate,and eyelashes are formed (in $weeks$)?

What is the average birth weight of a newborn baby (in $, kg$)?

Select the hormones that are produced only during pregnancy.

Amniotic fluid protects the foetus from

Find the correct statements :
$A.$ In human pregnancy,the major organ systems are formed at the end of $12$ weeks.
$B.$ In human pregnancy the major organ systems are formed at the end of $8$ weeks.
$C.$ In human pregnancy heart is formed after one month of gestation.
$D.$ In human pregnancy,limbs and digits develop by the end of second month.
$E.$ In human pregnancy the appearance of hair is usually observed in the fifth month.
Choose the correct answer from the options given below.

Which of the following germ layers gives rise to the germ cells?