Weight gain

S • Married since October 5, 2013. Baby girl born July 20, 2015🎀
My daughter was 8lbs, 1oz at birth. When released from hospital she was 7lbs 10oz. At her one week follow up she was back up to her birth weight and then her follow up appt a week later she's at 8lbs 5oz. My doc said he thought it would be more. She is very content and has lots of poops and pees. Anyone else experience slow weight gain? She's strictly Breastfed