There is no exact rule on how many days a 2 kg premature baby needs to be put in the incubator, but we need to consider the gestational week, the body temperature of the premature baby, the presence of complications, weight gain and general condition. Premature newborns born at 28 weeks of gestation and less than 37 weeks of gestation are preterm babies, and preterm newborns must decide the specific time to be put in the incubator according to the newborn’s condition. In general, the smaller the gestational week, the longer the time needed to be put in the incubator. Greater than 34 weeks of preterm infants, the relative time to put the incubator is shorter, about 10 days, and even some of the better condition of premature birth and do not need to put the incubator. And less than 34 weeks of premature babies, immature development, birth weight is also relatively light, may need to put the incubator for about 1 month, or even longer. When the baby can maintain a normal body temperature in the room temperature, weight of about 2kg, eating, sleeping and urinating and defecating are normal, you can leave the box.