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March 14, 2026SHILAP Revista de lepidopterología0 citationsOpen Access

Association between pre-pregnancy BMI and preterm birth in Chinese women: a retrospective study

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QLQ. LiXLXinyi LuJZJ Zhang

Key Points

  • To explore the association between pre-pregnancy BMI and the risk of preterm birth in Chinese women.
  • Conducted a retrospective analysis of pre-pregnancy BMI data and preterm birth outcomes.
  • Evaluated different BMI categories: underweight, normal weight, overweight, and obesity.
  • Analyzed the relationship between BMI and the incidence of preterm birth.
  • Underweight and severity of underweight did not significantly increase preterm birth risk.
  • Overweight and obesity were associated with a heightened risk of preterm birth.
  • The lowest risk of preterm birth was linked to a pre-pregnancy BMI of 18.5-21.5 kg/m²; risk increased beyond a threshold of approximately 24.5 kg/m².

Abstract

In Chinese population, pre-pregnancy underweight and severity of underweight were not significantly associated with the risk of PTB; while overweight and obesity increased the risk of PTB. The nadir of PTB risk corresponded to a PPBMI of approximately 18.5-21.5 kg/m2, with a potential risk threshold around 24.5 kg/m2.

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Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/69b4fb1bb39f7826a300b9fdhttps://doi.org/10.1080/07853890.2026.2639163
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