摘要
To the Editor:In recent years,as marriage and childbearing have been delayed,the ages of primiparous women have,in general,increased.In addition,with changes in the dietary habits of pregnant women,the body mass index (BMI)during pregnancy,and birth weight of newborns have also increased.A retrospective multi-center study demonstrated the effects of obstetric characteristics (increased maternal age and the BMI)and clinical treatment (labor induction and painless delivery)on labor duration:cervical dilatation was slower than that described previously,especially during cervical dilatation of 4 to 6 cm.This new information on labor duration could provide new research directions pre-pregnancy.That is, whether the BMI can become an indicator of the optimization and management of labor duration.This research aimed to assess the effects of pre-pregnancy body mass index (BMI)and gestational weight gain (GWG)on primipara duration of labor.
