Colostrum, the first milk that your body will produce to nourish your baby in his or her first couple of days after birth, actually appears at some point during pregnancy. Many women will see that their breasts start leaking small amounts of colostrum in the second or third trimester of pregnancy. Your breasts might continue to grow throughout your pregnancy. This is very common, although it does not happen to every pregnant woman and we have to note that you will be able to breastfeed your baby even if your breasts stay the same size. If you find your breasts grow enough to warrant buying new bras, you may want to look into buying some good nursing bras. These are not strictly necessary, but many women find that they do make breastfeeding easier and give you quicker access to your breasts while you are nursing.
Take into account that your breasts may still continue to grow when you go bra shopping. Some ladies go from an A Cup to a D Cup, or even bigger! Sometimes, growing breasts mean itchy and irritated skin. If you are experiencing this, try massaging some anti-stretch mark cream onto your breasts to help the skin cope with all the changes.