My baby is 3 and half months old. She is loosing a lot of hair in patches. How long will it take to regrow? Is it normal?

A. After 6 to 8 months of age once you get your child’s head clear after that only the proper care growth will happen but still if you are saying that the patches are going of two of the head then it would not be a very healthy sign if you want you can just discuss it with your doctor ones