Shaving the baby’s fetal hair at the full moon is unnecessary and lacks scientific basis, but if there is this custom, it can be followed without much effect on the baby. Some regions have the custom of shaving fetal hair at the full moon, that the baby’s fetal hair shaving can make the hair grow better, however, this custom lacks scientific basis. Baby’s hair growth has nothing to do with shaving fetal hair, is affected by the baby’s growth and development level, genetic factors, nutritional status and other factors. It should be noted that, because the baby’s skin is delicate, and the resistance to germs is poor, therefore, if shaving the fetal hair when the operation is not appropriate, it is easy to cause damage to the baby’s skin, causing infections, and even germs invade the hair follicles, resulting in damage to the hair follicles, affecting the normal growth of hair. Therefore, the baby full moon is not necessary to shave fetal hair, if you must shave, need to be careful operation, so as not to cause damage.