Hello.., My Baby birth weight is 3 kg after 10days she reduced 200 g. Now she is 50days old. And her weight is 3.800g. Is this normal

A. This is normal, During their first month, most newborns gain weight at a rate of about 1 ounce (30 grams) per day. They generally grow in height about 1 to 1½ inches (2.54 to 3.81 centimeters) during the first month. Many newborns go through a period of rapid growth when they are 7 to 10 days old and again at 3 and 6 weeks.