Influence Of Number Of Pregnancies In Peak Expiratory Flow And Body Composition Of Pregnant Women

  • Andrea Carla Brandao da Costa Santos Instituto de Medicina Integral Professor Fernando Figueira (IMIP)
  • Alex Sandro Rolland de Souza
  • Jousilene de Sales Tavares
  • Maria Elma de Souza Maciel Soares
  • Marcos Antonio de Araújo Leite Filho
  • Pollyana Soares de Abreu Morais
  • Thamyris de Sales Regis
  • Nysherdson Fernandes de Barros
  • Melania Maria Ramos Amorim


Objectives: to describe and compare the mean values of the body composition and the peak expiratory flow (PEF) in primigravidae and multigravidae and, to determine its correlation with obstetric, anthropometric and body composition variables.

Method: it was performed a cross-sectional study of 120 healthy pregnant women at low risk, including 77 primigravidae and 43 multigravidae. The PEF was measured by spirometry and the body composition by multisegmental electrical impedance. The unpaired t test was used to compare the groups and the Pearson correlation test was used to determine the association between PEF and independent variables. A multiple linear regression was used to estimate the relationship between the dependent variable, the PEF and the independent variables.

Results: the body composition variables in multigravidae women showed higher values compared to the primigravidae, being statistically significant, except for fat mass. In primigravidae, the PEF was correlated significantly with maternal age and height. In multigravidae, the PEF was correlated with maternal age, height, pre-pregnancy and current weight, total body water, extracellular water, fat mass, lean mass and fat-free mass. A Multiple linear regression analysis showed that, in primigravidae, height and maternal age were associated with PEF, being responsible for explaining 14.5% of its variability. The current weight and the maternal age explained 42.3% of peak flow variability in multigravidae.

Conclusion: The PEF seemed to be influenced by the number of pregnancies. Changes were observed in relation to the body composition, as it was evidenced in correlation with the PEF in multigravidae women.

Keywords: Pregnancy. Spirometry. Weight gain.

Author Biography

Andrea Carla Brandao da Costa Santos, Instituto de Medicina Integral Professor Fernando Figueira (IMIP)

Post-Graduate Program in Maternal-Infant Health


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How to Cite
SANTOS, Andrea Carla Brandao da Costa et al. Influence Of Number Of Pregnancies In Peak Expiratory Flow And Body Composition Of Pregnant Women. International Archives of Medicine, [S.l.], v. 10, june 2017. ISSN 1755-7682. Available at: <>. Date accessed: 21 nov. 2019. doi:
Obstetrics & Gynecology