In the 13th week of pregnancy, gestation begins to become noticeable. The mother's belly increases in size, as well as the breasts, which may feel hard and larger.
The secretion of colostrum, the first milk with which the baby will be fed, may take place, although there is still a long time left in the pregnancy.
It is also normal for reddish veins or streaks to appear under the skin of the breast. The nipples and areolae darken.