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Maternal atopy and changes in parity.

J Sunyer1, J M Antó, E Plana

  • 1Unitat de Recerca Respiratoria i Ambiental, Institut Municipal d'Investigació Mèdica, Barcelona, Spain.

Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology
|August 27, 2005
PubMed
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Atopic women may delay childbirth, but their fertility rate is not significantly lower. This study found no evidence that atopy decreases with more pregnancies.

Area of Science:

  • Immunology
  • Reproductive Health
  • Epidemiology

Background:

  • Atopic individuals often have fewer children, despite atopy potentially aiding conception.
  • Understanding the relationship between atopy and reproductive patterns is crucial for public health insights.

Purpose of the Study:

  • To investigate the association between atopy and the number of births in a cohort of young women.
  • To determine if changes in parity (number of births) correlate with alterations in atopy status.

Main Methods:

  • Serum-specific IgE levels were measured to define atopy in 4580 women (1991-92).
  • Atopy was re-assessed in 2414 women approximately 9 years later within the European Community Respiratory Health Study.
  • Statistical analyses adjusted for baseline parity, age, follow-up duration, education, and social class.

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Main Results:

  • At baseline, atopic women had fewer children, but this difference diminished by follow-up.
  • A non-significant trend suggested atopy might increase parity (RR=1.08; 0.86-1.35).
  • Atopy prevalence changes were consistent across birth cohorts and irrespective of changes in the number of children.

Conclusions:

  • Atopic women do not exhibit significantly higher fertility rates but may delay their first child.
  • The hypothesis that atopy decreases with successive pregnancies could not be confirmed by this study.