Bettegowda Vani R, Dias Todd, Davidoff Michael J, Damus Karla, Callaghan William M, Petrini Joann R
Perinatal Data Center, National Office, March of Dimes Foundation, 1275 Mamaroneck Avenue, White Plains, NY 10605, USA.
Clin Perinatol. 2008 Jun;35(2):309-23, v-vi. doi: 10.1016/j.clp.2008.03.002.
The increasing trend of delivering at earlier gestational ages has raised concerns of the impact on maternal and infant health. The delicate balance of the risks and benefits associated with continuing a pregnancy versus delivering early remains challenging. Among singleton live births in the United States, the proportion of preterm births increased from 9.7% to 10.7% between 1996 and 2004. The increase in singleton preterm births occurred primarily among those delivered by cesarean section, with the largest percentage increase in late preterm births. For all maternal racial/ethnic groups, singleton cesarean section rates increased for each gestational age group. Singleton cesarean section rates for non-Hispanic black women increased at a faster pace among all preterm gestational age groups compared with non-Hispanic white and Hispanic women. Further research is needed to understand the underlying reasons for the increase in cesarean section deliveries resulting in preterm birth.
孕周提前分娩的趋势不断增加，引发了对母婴健康影响的担忧。继续妊娠与提前分娩相关的风险和益处之间的微妙平衡仍然具有挑战性。在美国的单胎活产中，早产比例在1996年至2004年间从9.7%增至10.7%。单胎早产的增加主要发生在剖宫产分娩的人群中，晚期早产的百分比增幅最大。对于所有孕产妇种族/族裔群体，每个孕周组的单胎剖宫产率均有所上升。与非西班牙裔白人和西班牙裔女性相比，非西班牙裔黑人女性在所有早产孕周组中的单胎剖宫产率上升速度更快。需要进一步研究以了解导致早产的剖宫产分娩增加的潜在原因。
