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我国每年出生的新生儿中约有5％出生时体重低于2500克(2.5千克),被称为低出生体重儿,这些小儿多数是早产儿(即母亲妊娠不足37周即产下的婴儿),还有少部分是“足月小于胎龄儿”(即胎龄虽超过了37周,但出生体重明显低于同样胎龄儿的平均体重)。
Approximately 5% of newborns born each year in China weigh less than 2,500 grams (2.5 kg) at birth and are referred to as low birth weight infants. Most of these children are premature infants (ie, infants born less than 37 weeks’ gestation) , But also a small part of “full-term less than gestational age” (ie gestational age over 37 weeks, but the birth weight was significantly lower than the average weight of the same gestational age).