Excess pregnancy weight gain in latinas: Impact on infant's adiposity and growth hormones at birth.

Abstract

Excess maternal weight gain during pregnancy has been associated with childhood overweight and obesity both in mothers with and without obesity. Latinx children are at higher risk for earlier obesity compared with other population groups. A cohort of 82 self-identified pregnant Latina women were recruited at the prenatal clinics of Zuckerberg San Francisco General Hospital (ZSFG) prior to delivery during the second and third trimesters of pregnancy in 2011 and 2012. Maternal pre-pregnancy weight and weight prior to delivery were collected by self-report to calculate maternal pre-pregnancy body mass index (BMI) and weight gain in pregnancy. At delivery, anthropometric measurements of infants were obtained and cord blood and maternal finger stick blood samples were collected for hormonal assays. Fifty-three point seven percent of women had excessive weight gain in pregnancy. A high percentage of the cohort was overweight and obese prior to pregnancy (67.1%) with mean pre-pregnancy BMI 27.4±4.5kg/m2 and greater pre-pregnancy weight was independently associated with weight gain during pregnancy (OR 1.05, 95%CI 1.002-1.09). Mean infant birthweight was 3377.2±481.5g and excessive weight gain in pregnancy was independently associated with birthweight percentile (OR 13.46, 95%CI 2.43-34.50). Excessive gestational gain was positively associated with cord blood insulin-like growth factor-1 (IGF-1) and negatively with Peptide YY (PYY) levels. Latina women with pre-pregnancy overweight and obesity have a high rate of excessive gestational gain in pregnancy and could benefit from early counseling about appropriate gain in pregnancy. Excessive gestational weight impacts the intrauterine environment in high-risk infants impacting fetal growth and development.