Boomer A L, Christensen B L
J Reprod Med. 1982 Jul;27(7):385-8.
Infants born to women with hematocrit values below 31% showed an increased frequency of low birth weight. However, when the women were stratified by smoking history, differences in birth weight became apparent at the higher hematocrit levels. The data suggested an increased risk of low birth weight among women who smoke and have hematocrit values in the 41--47 range. Since smoking alters plasma volume, care should be taken when evaluating hematocrit levels measured late in pregnancy.
血细胞比容值低于31%的女性所生婴儿出现低出生体重的频率增加。然而，当根据吸烟史对这些女性进行分层时，在较高的血细胞比容水平下，出生体重的差异变得明显。数据表明，吸烟且血细胞比容值在41 - 47范围内的女性出现低出生体重的风险增加。由于吸烟会改变血浆量，在评估妊娠晚期测得的血细胞比容水平时应谨慎。
