1·About 13 percent of all live births in the United States are preterm, meaning the baby is born before the 37th week of pregnancy, according to the Centers for Disease Control and Prevention.
在美国约有13%的存活产婴儿是早产，这意味着在婴儿是怀孕37周之前出生的，根据美国疾病控制和预防中心的一项调查显示。
2·Evidence linking abortion and preterm birth continues to pile up, researchers and advocates say.
研究人员和支持者说，堕胎和早产关联的证据在不断增加。
3·Other small studies have found that depressed women have a slightly higher likelihood of miscarrying and giving birth preterm, compared with their healthy counterparts.
其它小型研究已经发现，与健康女性相比，患有抑郁的女性出现流产和早产的几率会略微更高。
4·The study found an increased risk of brain damage and cognitive deficits in babies whose mothers were treated with terbutaline during preterm labor.
研究发现如果婴儿的母亲在预防早产期间曾经使用过特布他林，那么就会增加婴儿的大脑受损和认知障碍的风险。
5·There are risks to the mother with preterm birth as well, as other studies have found that women who give birth at less than 32 weeks double their lifetime risk of breast cancer.4.
早产也会给妈妈们带来很多危险，由另一些研究发现表明妇女如早于32周产婴会使她们患乳腺癌风险加倍。