A prospective study of late preterm infants' physical growth

ZHANG Zhan-Zhan; CHENG Qian

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Chinese Journal of Contemporary Pediatrics ›› 2012, Vol. 14 ›› Issue (07) : 481-484.

CLINICAL RESEARCH

A prospective study of late preterm infants' physical growth

ZHANG Zhan-Zhan, CHENG Qian

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Abstract

OBJECTIVE: To evaluate birth weights (BW) in late preterm infants (LPI) with different gestational ages (GA) and their physical growths at correct ages (CA) 1, 3 and 6 months. METHODS: A total of 287 LPIs were recruited for a cohort study between May 2010 and September 2011. Birth weights (BW) in infants with different gestational ages and their physical growths at CA 1, 3 and 6 months were evaluated. RESULTS: Of the 287 LPIs, mean BW in LPIs with gestational ages of 34-34+6and 35-35+6weeks was significantly lower than the reference value from a physical growth investigation on newborns of 15 cities of China in 1986 (P<0.05). However, mean BW in singleton LPIs (n=128) with gestational ages of 36-36+6weeks was significantly higher than the reference value (P<0.05). At CA 1, 3 and 6 months, more than 90% LPIs reached P3 level in weights for age, length for age and head circumference for age. At CA 1 and 3 months, weight for age and head circumference for age in the LPIs were statistically higher than the reference values of physical growth in children under 7 years from nine cities of china in 2005 (P<0.05). Mean length for age at CA 1, 3 and 6 months was not significantly different from the reference value. CONCLUSIONS: There are obvious differences in BW in the LPIs compared with the reference value from a physical growth investigation on newborns of 15 cities of China in 1986, suggesting that the reference value of BW at different gestational ages needs to be updated in a certain interval. Before CA 6 months, there is a risk of overweight in LPIs and long-term monitoring is necessary. Growth of length should be followed-up for a long time.

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Physical growth / Gestational age / Birth weight / Late preterm infant

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ZHANG Zhan-Zhan, CHENG Qian. A prospective study of late preterm infants' physical growth[J]. Chinese Journal of Contemporary Pediatrics. 2012, 14(07): 481-484

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