#asktheexperts weight of my twins when they were born was 1.6 and 1.5kgs respectively now they are 3months 22 days old their weight is 4.34 and 4.04kgs.is the weight good enough? they are active from evenings and don't sleep till past midnight and sleepy during the day. they have soiled diapers. still I want to know what can be done to increase their weight. they are on breastfeeding and even when they are bottle fed it's mother's milk.