How long a preterm baby takes preterm formula needs to be judged according to the growth of the preterm baby, if the preterm baby has reached normal newborn weight it can be gradually stopped. High-risk preterm babies have poorer growth and development, and can eat preterm formula until 6-12 months. Medium-risk preterm infants have better growth and development and can take preterm formula until 3-6 months. If the preterm baby has reached the normal weight standard and has good growth and development, you can stop the preterm formula. Preterm milk powder contains relatively more nutrients, such as DHA, amino acids, fatty acids, etc., which are helpful to the physical development of preterm babies. Normally, you need to observe your preterm baby’s physical condition more often, and if there are any uncomfortable symptoms, you need to consult a doctor in time.