Read the following statements and choose the correct option: 1. By the end of about 24 weeks, the body is covered with fine hair, eyelids separate, and eyelashes are formed. 2. By the end of six months of pregnancy, the foetus is fully developed and is ready for delivery. 3. The duration of human Pregnancy is called the gestation period. 4. In human beings, after two months of pregnancy, the embryo’s heart is formed.

Step-by-step solution

In human beings, after one month of pregnancy, the embryo’s heart is formed. The first sign of growing foetus may be noticed by listening to the heart sound carefully through the stethoscope. 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 welldeveloped. The first movements of the foetus and appearance of hair on the head are usually observed