What number of ounces of breastmilk should I feed my newborn?

About 1 oz an hour. From birth to 6 months, newborns take in about one ounce per hour of day. So if you're feeding every 3-4 hours, about 3-4 ounces is appropriate. Each baby is different, however, so as long as they are gaining weight on a normal curve, they should be fine. Find more info here: http://kellymom.com/bf/pumpingmoms/pumping/milkcalc/ Best wishes and congrats on your newborn!