Amount of ML per feeding day 4

Matt

Hey new families and growing ones. Me and my wife’s first baby, we made it to day 4 and we are following all guidelines but our little guys weight isn’t going up. We just pumped and syringe fed him due to her nipples being sore but it was only 4ml. I’m seeing that each feeding needs to be 30-45 mls. Is my wife just not producing enough? We really don’t want to use formula.