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Interpregnancy changes in maternal weight and body mass index
David A Crosby1, Martha Collins1, Amy O'Higgins1
1University College Dublin Centre for Human Reproduction, Coombe Women and Infants University Hospital, Dublin, Ireland.
Maternal weight often increased between pregnancies, with two-thirds of women gaining weight after their first baby. This study tracked changes in maternal weight and body mass index (BMI) during early pregnancy.
Area of Science:
- Reproductive Health
- Maternal Health
- Obstetrics
Background:
- Maternal weight and body mass index (BMI) are crucial indicators of health during pregnancy.
- Understanding weight changes between pregnancies is important for maternal health outcomes.
Purpose of the Study:
- To compare changes in maternal weight and BMI in early pregnancy.
- To analyze weight fluctuations between a woman's first antenatal care visit for her first child and her subsequent antenatal care visit.
Main Methods:
- Longitudinal study of primigravidas delivering their first baby in 2009.
- Maternal weight and height measured before 18 weeks' gestation in both pregnancies.
- Body mass index (BMI) calculated for each pregnancy.
Main Results:
- Mean pre-pregnancy weight was 66.4 kg, with a mean BMI of 24.5 kg/m².
- 11.3% of women were classified as obese.
- Of 1,220 women who re-attended for antenatal care, 64.6% gained weight (mean 4.6 kg), 33% lost weight (mean 3 kg), and 2.4% maintained weight.
Conclusions:
- The birth of a first child was associated with maternal weight gain in the majority of women.
- Two-thirds of women experienced increased maternal weight between pregnancies.
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