The trajectories of physical growth in 4 months postnatal corrected age among preterm infants discharged from neonatal intensive care units and associated factors: A prospective study.

In China, which has the second largest population of preterm infants worldwide, the incidence of preterm births is approximately 7%, with an increasing trend in the past 30 years (annual growth rate: 1.1%–1.3%) that could continue for a long period [ 3 ] due to the three-child policy and advances in assisted reproductive technology.

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