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Childhood growth outcomes 2 years after hypertensive versus normotensive pregnancy: a P4 study
Megan L Gow1,2,3, Priya Vakil4, Lynne Roberts5,6
1Discipline of Paediatrics and Child Health, School of Clinical Medicine, UNSW Medicine and Health, Sydney, NSW, Australia. megan.gow@sydney.edu.au.
Insights
Infants exposed to hypertensive pregnancy disorders like preeclampsia (PE) and gestational hypertension (GH) showed accelerated weight gain from birth to 2 years. This rapid growth may increase future cardiometabolic disease risk.
Area of Science:
- Perinatal medicine
- Pediatric growth and development
- Maternal-fetal medicine
Background:
- Hypertensive disorders of pregnancy, including gestational hypertension (GH) and preeclampsia (PE), can impact infant development.
- Intrauterine exposure may lead to long-term health implications for the child.
Purpose of the Study:
- To compare infant growth outcomes from birth to 2 years among those exposed to normotensive pregnancy (NTP), GH, or PE.
- To identify potential long-term effects of hypertensive pregnancy disorders on infant growth trajectories.
Main Methods:
- Prospective cohort study (P4) involving infants born to mothers with NTP (n=240), GH (n=19), or PE (n=66).
- Assessment of infant growth using birth, 6-month, and 2-year weight z-scores, change in weight z-scores, rapid weight gain, and conditional weight gain.
- Age-correction applied for 6-month and 2-year assessments.
Main Results:
- Infants exposed to PE had significantly lower birth weight and length z-scores compared to NTP or GH groups.
- No significant differences in growth outcomes were observed at 6 months or 2 years between the groups.
- Both GH and PE-exposed infants exhibited significantly greater weight z-score gain and rapid weight gain from birth to 2 years compared to NTP infants.
- Accelerated weight gain remained significant for PE-exposed infants after adjusting for confounders.
Conclusions:
- Gestational hypertension and preeclampsia are associated with accelerated infant weight gain up to 2 years of age.
- This accelerated growth trajectory may elevate the risk of future cardiometabolic diseases.
- Monitoring infant growth patterns following exposure to hypertensive disorders of pregnancy is recommended to mitigate risks of obesity and related conditions.
Background:
Intrauterine exposure to hypertensive disorders of pregnancy, including gestational hypertension (GH) and preeclampsia (PE), may influence infant growth and have long-term health implications. This study aimed to compare growth outcomes of infants exposed to a normotensive pregnancy (NTP), GH, or PE from birth to 2 years.
Methods:
Infants were children of women enroled in the prospective Postpartum Physiology, Psychology and Paediatric (P4) cohort study who had NTP, GH or PE. Birth, 6-month (age-corrected) and 2-year (age-corrected) weight z-scores, change in weight z-scores, rapid weight gain (≥0.67 increase in weight z-score) and conditional weight gain z-scores were calculated to assess infant growth (NTP = 240, GH = 19, PE = 66).
Results:
Infants exposed to PE compared to NTP or GH had significantly lower birth weight and length z-scores, but there were no differences in growth outcomes at 6 months or 2 years. GH and PE-exposed infants had significantly greater weight z-score gain [95% CI] (PE = 0.93 [0.66-1.18], GH = 1.03 [0.37-1.68], NTP = 0.45 [0.31-0.58], p < 0.01) and rapid weight gain (GH = 63%, PE = 59%, NTP = 42%, p = 0.02) from birth to 2 years, which remained significant for PE-exposed infants after confounder adjustment.
Conclusion:
In this cohort, GH and PE were associated with accelerated infant weight gain that may increase future cardiometabolic disease risk.
Impact:
Preeclampsia exposed infants were smaller at birth, compared with normotensive pregnancy and gestational hypertension exposed infants, but caught up in growth by 2 years of age. Both preeclampsia and gestational hypertension exposed infants had significantly accelerated weight gain from birth to 2 years, which remained significant for preeclampsia exposed infants after adjustment for confounders including small for gestational age. Monitoring of growth patterns in infants born following exposure to a hypertensive disorder of pregnancy may be indicated to prevent accelerated weight gain trajectories and obesity.
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