1·Anemia; Preterm birth; Pregnancy; Pregnancy outcome.
贫血；早产；妊娠，妊娠结局。
2·Preterm birth, birth asphyxia and infections cause most newborn deaths.
早产、出生窒息和感染是儿童死亡的主要原因。
3·Preterm birth is an important perinatal health problem across the globe.
早产是全球范围内一个重要的产期健康问题。
4·Preterm birth is defined as a birth that takes place before 37 weeks gestation.
早产被定义为怀孕不到37周的生产。
5·Objective: To analyze some epidemiological characteristics of preterm birth.
目的：探讨早产分娩的部分流行病学特征。
6·Preterm birth is the leading cause of 75% perinatal morbidity and mortality.
据报导围生儿死亡与患病中的75%与早产有关。
7·We investigated the use of progesterone for prevention of preterm birth in twin pregnancy.
我们研究使用黄体激素来预防怀双胞胎女性早产的风险。
8·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。
9·Preterm birth, Caesarean section and intrapartum complications were associated with neonatal death.
早产、剖腹产和产时并发症与新生儿死亡相关。
10·But the preterm birth rate-defined as babies born before 37 weeks gestation-doesn't tell the whole story.
虽然早产率一般被定义为在妊娠期达到37周之前的分娩，但并不能断定那样就是安全的。