It is normal for a baby to be born clean with no meconium, indicating that the newborn’s intrauterine development is mature. When the fetus grows and develops in the uterus, the role of fetal fat is to protect the fetal skin from being infiltrated by amniotic fluid, to prevent the skin from breaking down, and to provide insulation, warmth, and to prevent excessive heat dissipation. Fetal fat is a layer of white material covering the surface of the newborn’s skin, fetal development and maturity in the uterus, before birth, fetal fat shedding, shedding of fetal fat is eaten by the fetus, and then transformed into fetal stool out of the body. The baby was born very clean without fetal fat is normal, is normal after the birth of full-term mature child performance, parents do not need to be too nervous, usually pay attention to the baby’s skin care can be. Some babies have a small amount of fetal fat after birth or preterm babies have a lot of fetal fat, usually 1~2 days will be absorbed, do not have to deliberately wipe off.