Expected growth in a breast-fed infants is similar to growth in bottle-fed infants. Any infant who is gaining weight steadily is doing exactly what they need to be doing and not a cause for concern. Infants may increase at very slightly different rates, but that is ok!
Also, it is normal for a breast-fed infant to lose 5% to 8% of birth weight in the first few days of life and not begin to gain until the fifth to the seventh day, with birth weight being regained at 10 to 14 days. Infants fed formula often lose only 1% to 2% of body weight and regain birth weight by the first week.