Maternal, healthcare, and nutritional factors influencing birth defects in China from 2019 to 2025: a systematic review and meta-analysis - Takeaways - MDSpire

Maternal, healthcare, and nutritional factors influencing birth defects in China from 2019 to 2025: a systematic review and meta-analysis

  • By

  • Min Yang

  • Jia Lv

  • Tianzhi Guo

  • Min Ren

  • Lingling Xie

  • Suhua Tu

  • July 3, 2026

  • 0 min

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  • 1

    This systematic review evaluates factors influencing birth defects in China from 2019 to 2025, analyzing 25 studies with 26,019 cases.

  • 2

    Seventeen influencing factors were identified, including maternal age, BMI, drug use, and healthcare service access.

  • 3

    Irregular folic acid supplementation was linked to increased risk of neural tube defects, with an odds ratio of 2.34.

  • 4

    Subgroup analyses revealed reduced heterogeneity for factors like adverse pregnancy history and preterm birth.

  • 5

    The study highlights the need for targeted interventions on controllable factors to reduce birth defect incidence in China.

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