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[Adequacy of prenatal care and birthweight: a systematic review]

Denise S Silveira1, Iná S Santos

  • 1Departamento de Medicina Social, Faculdade de Medicina, Universidade Federal de Pelotas, Pelotas, Brazil. denisilveira@uol.com.br

Cadernos De Saude Publica
|October 16, 2004
PubMed

Insights

Prenatal care's impact on birthweight is unclear, with conflicting results across study types. More randomized trials are needed to confirm if adequate prenatal care truly prevents low birthweight.

Area of Science:

  • Obstetrics and Gynecology
  • Public Health
  • Epidemiology

Background:

  • Prenatal care is crucial for maternal and infant health.
  • Its role as a predictive factor for birthweight requires clarification.
  • Existing research shows varied outcomes regarding prenatal care adequacy and birthweight.

Purpose of the Study:

  • To systematically review literature on prenatal care as a predictor of birthweight.
  • To analyze the impact of different prenatal care indicators (utilization and content) on birthweight outcomes.
  • To identify research gaps and methodological limitations in existing studies.

Main Methods:

  • Systematic literature review of MEDLINE, Cochrane Library, and SciELO databases.
  • Search terms included "prenatal care", "antenatal care", "quality", "adequacy", "birthweight", and "low birthweight".
  • Analysis of 25 studies (17 cross-sectional, 4 cohort, 3 case-control, 1 randomized trial) using quantitative and qualitative indicators.

Main Results:

  • Most cross-sectional studies indicated a protective effect of prenatal care against low birthweight.
  • Cohort and case-control studies presented conflicting results on the relationship.
  • Quantitative indicators of prenatal care adequacy were more commonly used than qualitative ones.

Conclusions:

  • The impact of prenatal care on birthweight is not definitively established.
  • Self-selection bias may confound the observed associations.
  • Further high-quality randomized controlled trials are essential to clarify the relationship between prenatal care and birthweight.

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