NEET BIOLOGY

Detailed explanation-1: -After a girl is pregnant, she no longer gets her period. But girls who are pregnant can have other bleeding that might look like a period. For example, there can be a small amount of bleeding when a fertilized egg implants in the uterus. Doctors call this implantation bleeding.

Detailed explanation-2: -Throughout your pregnancy, your body retains the lining of your uterus, which is why you stop getting your period during this time.

Detailed explanation-3: -High levels of progesterone and estrogens during pregnancy suppresses the gonadotropins which are required for the development of new follicles. Therefore, a new cycle cannot be initiated.

Detailed explanation-4: -However, during pregnancy, the level of both these hormones is high due to which the endometrium continues to thicken to make it suitable for implantation. Hence, menstrual cycles remain absent for the entire gestation or pregnancy period.