Under normal circumstances, the fetus delivered after 37 weeks of pregnancy is called a full-term baby, while at 35 weeks of pregnancy, it is generally called a preterm baby. The defects of preterm babies vary from person to person, some may not have any defects, while some may have neonatal pneumonia, necrotizing enterocolitis, as well as low blood calcium, jaundice, and neurological deficiencies, etc. This is because at 35 weeks of pregnancy, the fetal nervous system may not be fully developed. This is because when a woman is 35 weeks pregnant, the fetus’s nervous system may not be fully developed, so after being born prematurely, there may be incoordination of the arms and legs due to neurodevelopmental deficiencies, or there may be other abnormal crying manifestations, and also due to the baby’s low immunity, and the immature development of the fetal lungs, so it is easy for newborn babies to get pneumonia after being born, which can lead to the fetus having significant Breathing fast, air tight and other chronic hypoxia performance, but also may cause increased muscle tone, and even moderate anemia and umbilical hernia and other complications, some preterm infants are also prone to necrotizing enterocolitis, as well as hypocalcemia, which may cause shivering of the hands and feet performance, generally need to be considered for hospitalization, and preterm infants are not well insulated, so they also need to be warmed up in the warmth of the incubator. Therefore, fetuses delivered at 35 weeks need to survive in the incubator for about 7 to 14 days, and then they can grow in the natural environment if they are observed to be free of any abnormalities.