Nope. Milk supply actually stays very consistent from about six weeks until your baby starts solids, so your overall caloric needs stay about the same throughout that time period. And actually, your caloric needs have more to do with your current body size and activity level than your baby's age or ability to slurp down masses of milk. Just continue to shoot for a healthy, well-balanced diet, and eat when you're hungry. Baby isn't likely to suffer if you are taking in too few calories…but you might. So pay attention to your body and energy levels, and add a snack if you’re losing weight too quickly or feeling wiped out — baby needs you to be on your game.