Most women will see their breasts increase in size beginning in the first trimester of pregnancy. This happens as the ducts and alveoli in the breast multiply rapidly in preparation for breastfeeding. In general, most expecting mothers gain 2-3 cup sizes during pregnancy. Everyone’s breasts are going to differ a bit in how they change and grow during pregnancy. This episode discusses some of the challenges expecting moms with large breasts may encounter during pregnancy and breastfeeding.