In the early stages of pregnancy, women’s breasts will undergo a series of changes, mainly in the following aspects: 1. The breasts of women in the early stages of pregnancy will increase in size as well as swelling and pain because the levels of chorionic gonadotropin and progesterone in women’s bodies will increase significantly after pregnancy, and the secretion level of estrogen will also increase, and the breasts will increase in size as well as slight swelling and pain under the action of these hormones. 2. The nipples and The nipples and areolas of pregnant women will have deepened coloring, and the color will deepen and increase, and a black bulge will appear around the nipples of pregnant women, which is clinically known as Montserrat’s nodules. When the above changes occur in a woman’s breasts and are accompanied by menopause, it is highly suspected that the symptoms are caused by pregnancy and she should go to the hospital for an early pregnancy test in time.