My baby was born three weeks early at 6lbs 2 oz. He dropped down to 5lbs 8 oz at three days old.

By a week old he was back up to birth weight .

After that he steadily gained weight on his curve until 2 months of age. He was 10.04 lbs at 2 months. He is now 3.5 months old and weighs 10.13.

He acts content after a feeding (I feed on demand... Never gone longer than 3 hrs during the day) , he sleeps 6 hrs straight at night before waking up for a feeding, has plenty of wet diapers, all the signs is he should be gaining weight.

I am at a loss!