超重和肥胖已成为相当严重的健康问题。研究表明母体的许多因素如妊娠前体质量指数(BMI)、妊娠期体质量增加以及不同程度的糖耐量异常都与妊娠结局有关。有报道,减少妊娠期体质量增长会增加早产儿和低出生体质量儿的风险,但体质量增加过多又会使其他并发症如巨大儿的发生风险增 Overweight and obesity have become quite serious health problems. Studies have shown that many factors of the mother such as pregnancy precursor mass index (BMI), increased body mass during pregnancy, and varying degrees of impaired glucose tolerance are associated with pregnancy outcomes. It has been reported that reducing weight gain during pregnancy increases the risk of preterm and low birth weight infants, but excessive body weight increases risk of other complications such as maternal morbidity