Female infants can grow long hair directly without cutting their fetal hair. In fact, fetal hair usually does not need human intervention, usually by three or four months, fetal hair will also fall off naturally. Whether or not to cut the fetal hair does not have any effect on the baby’s development, only need to pay attention to the following two points. 1. If the hairs are thick and dense, causing sweaty scalp or even heat rash or eczema, the hairs can be cut short in order to relieve the baby’s discomfort. But don’t shave the baby, because there is a possibility of damaging the hair follicles, resulting in the appearance of temporary non-growth of hair. 2. If you do not want to cut the hair, but also pay attention to keep clean, dry, you can often use water to wash the child’s hair, promote scalp metabolism, to prevent rashes.