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早产儿约占新生儿总数的5%~15%,早产儿存活率低,存活后约1/4遗留不同程度智力障碍等后遗症[1],给家庭、社会带来沉重负担。早产是围生儿死亡的重要原因之一,因此,降低早产发生率具有重要意义。治疗早产的目的是抑制宫缩,延长孕龄,使胎儿特别是肺最大可能成熟,改善新生儿预后。?
Premature babies account for about 5% to 15% of the total number of newborns, low survival rate of premature babies, and about 1/4 of survivals left with varying degrees of mental retardation and other sequelae [1], which bring heavy burdens to families and society. Premature labor is one of the important causes of perinatal death, therefore, reducing the incidence of preterm birth is of great significance. The purpose of treatment of premature delivery is to inhibit uterine contractions, prolong gestational age, the fetus, especially the lungs may be the most mature, improve the prognosis of newborns. ?