Continuing to breastfeed while pregnant is a very personal decision. If a mom becomes pregnant while still nursing her babe, she may take it as a sign to be done. For some, the hormones of pregnancy make nursing uncomfortable, especially when they feel sick as dogs or exhausted to the bone. Whatever the reason, it is usually perfectly safe to breastfeed while pregnant. Your body will carry on producing enough milk to nourish your older child, while your unborn baby will get all the nutrients they need from your body. Breastfeeding does trigger mild contractions.