question_answer

Direction: Read the following and answer the questions from given below

The human pregnancy lasts for about 9 months. During this embryo undergoes various developmental changes. In human beings, after one month of pregnancy, the embryo heart is formed. The first sign of growing foetus may be noticed by listening to the heart sound carefully. By the end of the second month of pregnancy, the foetus develops limbs and digits. By the end of 12 weeks (first trimester) most of the major organ systems are formed. For example, the limbs and external genital organs are well developed. The first movements of the foetus and appearance of har on the head are usually observed during the fifth month. By the end of about 24 weeks (end of second trimester) the body is covered with fine hair, eyelids separate and eyelashes are formed. By the end of nine months of pregnancy, the foetus is fully developed and is ready for delivery.

(iv) In human adult female, oxytocin the major hormone produced during pregnancy to

A) stimulate pituitary to secrete vasopressin

B) cause uterine contractions during parturition

C) secrete hormone from anterior pituitary

D) stimulate growth of mammary glands