What are the reasons for a newborn having a small amount of hair?

Patient's question:

1 year old, with fine and sparse hair, yellow and soft, not good at all, please ask if newborn hair is less what

Doctor's answer:

Newborns have little hair on one hand, the genetic tendency is significant, and there is individual variation. The quantity, color, and pros and cons of hair are related to the parents' genetics to a certain extent. If the parents have good hair, the child's hair will also be better, and if the parents have poor hair, the child's hair will also be poor. On the other hand, the number of hair at birth is unrelated to the future hair quantity. Hair growth in infants is the same as physical growth. It can be early or late, fast or slow. As the body develops, most children will gradually transition from thin to dense, from yellow to black. A large number of facts show that by the age of 1 to 2, infants with sparse hair are no different from other children.