Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics · 2026
[Impact of pre-pregnancy body mass index on maternal and infant outcomes in twin pregnancies].
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Wang Hai-Yan, Shi Bi-Jun, Lu Dan-Fang, Ren Shu-Hua, Huang Kang, Shen Wei, Chen Zhi-Feng, Liu Jin, You Chu-Ming, Li Gui-Fang, Jiang Hong, Rao Hong-Ping, Qiu Jian-Wu, Wei Xian, Zhang Ya-Yu, Lin Xiao-Bo, Jiang Hai-Yan, Han Sha-Sha, Wang Fan, Zhang Wei-Xing, Yang Xiu-Fang, Wang Yi-Tong, Lin Ni-Yang, Tan Xiao-Hua, Cui Qi-Liang
Аннотация
METHODS: A retrospective analysis included 4 824 twin pairs and their mothers with complete records, delivered at 21 tertiary grade-A hospitals nationwide from January 2018 to December 2020. Participants were grouped by prepregnancy BMI: underweight (<18.5 kg/m²; n=566), normal weight (18.5 to <24.0 kg/m²; n=3 120), overweight (24.0 to <28.0 kg/m²; n=892), and obese (≥28.0 kg/m²; n=246). Differences and associations in adverse maternal and infant outcomes were compared among groups.
RESULTS: The gestational age in the overweight group was lower than in the normal and underweight groups, with a higher rate of very preterm birth (P<0.008). Compared with the normal and overweight groups, the proportion of small-for-gestational-age (SGA) neonates was higher in the underweight group (P<0.008). After adjustment for confounders, the obese group had higher risks of gestational diabetes mellitus and hypertensive disorders of pregnancy than the normal and underweight groups (all P<0.001). Compared with the normal group, the underweight group had a higher risk of SGA among twins (P<0.05).
CONCLUSIONS: Maternal prepregnancy BMI is closely associated with maternal and infant outcomes in twin pregnancies, providing evidence-based support for individualized weight management.
RESULTS: The gestational age in the overweight group was lower than in the normal and underweight groups, with a higher rate of very preterm birth (P<0.008). Compared with the normal and overweight groups, the proportion of small-for-gestational-age (SGA) neonates was higher in the underweight group (P<0.008). After adjustment for confounders, the obese group had higher risks of gestational diabetes mellitus and hypertensive disorders of pregnancy than the normal and underweight groups (all P<0.001). Compared with the normal group, the underweight group had a higher risk of SGA among twins (P<0.05).
CONCLUSIONS: Maternal prepregnancy BMI is closely associated with maternal and infant outcomes in twin pregnancies, providing evidence-based support for individualized weight management.