How can I expect my breasts to change in pregnancy?

Prep for lactation. In the first weeks of pregnancy there is breast tenderness or fullness, enlargement and prominence of the glands of the areola (the area around the nipple), darkening of the areola. Later in pregnancy the breasts enlarge. All of these occur in preparation for feeding the newborn. Every pregnant woman should consider these as welcome changes and an opportunity to provide her baby nourishment.
Fullness, swelling. Most commonly, your breasts will start to feel fuller, and may sell, as hormones change and they start to get ready to produce milk for the baby. The areolar area may change in color slightly too.