大于胎龄儿(Large for gestational age),也称作巨婴症,用于描述出生时体重特别重的婴儿,是与其他相同发育年龄的婴儿相比,体重超过体重生长曲线图的90%或以上(其体重比90%相同发育年龄的婴儿要重)[1][2][3]巨大儿(Macrosomia)也是一个类似描述出生体重过重的术语,但指的是绝对测量值,与胎龄无关[4]。通常诊断巨大儿的阈值是出生时体重在 4,000 到 4,500 克或更多之间,但此一定义还很不一致[4]

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