Babies born at 36 weeks of pregnancy belong to preterm babies, most of their body growth and development are still immature, and their immunity is weaker and their body functions are not perfect compared to those of normal delivery, so they need to be kept warm if they catch a cold or fever easily. Premature babies may have some special complications, such as respiratory distress syndrome, hypoglycemia, pathological jaundice and so on, so it is safer to recommend hospitalization. Babies born after 37 weeks of gestation are full term and most do not require transfer to the NICU. The duration of warming depends on the specific situation after birth. If the fetus has normal signs, normal indicators of all tests, does not affect feeding, and does not have any state of illness, and weighs between 2-2.5 kg, it is usually observed for 7-10 days. If there are abnormalities, the duration of observation needs to be decided on a case-by-case basis. Premature babies are kept in the hospital for observation, and in addition to keeping them warm, they are tested for the development of disease. If the mother has gestational diabetes in combination, the premature baby may have immature lungs and is recommended to be hospitalized for observation and needs to be monitored for blood glucose. In addition to this, attention should be paid to the respiratory condition, and if there is difficulty in breathing, the symptoms need to be improved by means of oxygenation. In addition, preterm infants have poor sucking power and weak swallowing reflexes, which often make breastfeeding difficult and may cause vomiting, so it is safer to stay in the neonatal ward.