Objective: to explore the relationship body mass index (BMI) during pregnancy and head presentation dystocia.

目的：探讨孕期体重指数(BMI)与头位难产的关系。

youdao

Objective: to explore the relationship body mass index (BMI) during pregnancy and head presentation dystocia.

目的：探讨孕期体重指数(BMI)与头位难产的关系。

youdao