👉 Gestations, also known as pregnancy periods, refer to the stages of a woman's reproductive cycle. During this time, the lining of the uterus (ovary) begins to develop and prepares for the start of pregnancy. The first sign that you might notice is your breasts becoming firm and sensitive, similar to how they would be when you're pregnant. It can also be felt in the lower abdomen or in the area between your legs during menstruation.