Newborn babies generally have hair. Newborn babies generally have hair, but the density of the hair and the amount of hair will vary. The amount and density of a baby’s hair depends most of all on genetics. The amount, curvature and color of a fetus’s hair are all genetically related. Besides being related to genetic factors, nutritional elements are also more important. If a woman’s nutrition is balanced during pregnancy, her newborn baby will have thicker hair. On the contrary, if the nutritional status during pregnancy is poor, the hair may be yellowish or thinning. If your newborn baby has any abnormalities, you need to seek medical attention to identify the cause and intervene in a timely manner to avoid delays.