许多遗传性疾病导致胎儿在出生前就受到不可逆的损害，还有一些遗传性疾病在症状表现明显以前如果获得治疗则可以从治疗中获益。
A number of genetic disorders result in irreversible damage to the fetus before birth, as well as for those with genetic disorders who may benefit from therapy before symptoms are manifested.
我们也许无法改变出生前的胎儿。
宫内诊断即产前诊断，是指在胎儿出生前，通过各种手段对胎儿进行先天性缺陷或遗传性疾病的诊断。
Fetal in utero diagnosis, that is, prenatal diagnosis, means diagnosis of those abnormal babies with congenital defect or inheritance disease before their delivery.
对于孕不足34周而七天内很可能分娩的孕妇在胎儿出生前给予皮质激素以促进胎儿肺成熟。
C. Antenatal corticosteroids to promote fetal lung maturation should be administered to women less than 34 weeks of gestation who are at high risk for delivery within the next seven days.
而就在昨天，她已经在照料两个健康的女儿了。这对胎儿在出生前，其中的一个拯救了另一个的生命。
Yesterday, however, she was cradling two healthy daughters after one saved the other's life before they were born.
美国医生说在孩子出生前吸烟的妈妈将会减缓他们的胎儿的肺的发育。
American doctors say that mothers who smoke cigarettes before their babies are born may slow the growth of their babies' lungs.
美国医生说在孩子出生前吸烟的妈妈将会减缓他们的胎儿的肺的发育。
American doctors say that mothers who smoke cigarettes before their babies are born may slow the growth of their babies' lungs.
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