Breasts actually rarely leak DURING pregnancy. Milk and the early stages of milk doesn't come in usually until you give birth. Having 'milk' or discharge or leaking from the breasts before that is simply due to hormones and does not have anything to do with breast feeding. I had a prolactin problem and had 'leaking breasts' when I wasn't pregnant due to a hormonal imbalance. I never leaked at all during pregnancy. :>) Hope this helps