7 months preterm baby incubator generally need to stay 7-10 weeks, and specific physical and developmental factors. 7 months preterm babies weaker, and the degree of development is slow, in the incubator to stay longer, usually need to stay 9-10 weeks, can effectively reduce the impact of the external environment on the growth and development of preterm babies to help promote the normal growth of preterm babies. 7 months preterm babies stronger and faster development, usually need to stay in the incubator for 7-8 weeks. When the body indicators return to the normal value of the same age, can be removed from the incubator. 7 months premature babies should be under the guidance of the doctor to clarify the specific time with the incubator.