1·Premature birth is the main cause of perinatal mortality.
早产是围产期死亡的主要原因。
—— 《柯林斯英汉双解大词典》
2·He said the risk of premature birth was likely to be a mix of genetic and environmental factors.
他说早产的风险可能是基因和环境因素的综合。
3·The boy's mother had suffered from diabetes, which may have caused the premature birth.
男童的母亲患有糖尿病，可能因此造成早产。
4·Premature birth, and the low birth weight that's associated with it, has been linked to long-term negative consequences.
早产和由此带来的低出生体重，会带来长期的负面后果。
5·The Omega 3 fatty acids seem to have a positive effect on fetal brain development and may reduce the risk of premature birth. There are positive effects on the growth and health of the fetus.
w - 3脂肪酸对于胎儿大脑的发育有积极的作用，并可能减少早产的风险，还有利于胎儿的发育和健康。