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Relationship of Maternal Weight Status Before, During, and After Pregnancy with Breast Milk Hormone Concentrations
Author(s) -
Sadr Dadres Ghazaleh,
Whitaker Kara M.,
Haapala Jacob L.,
Foster Laurie,
Smith Katy D.,
Teague April M.,
Jacobs David R.,
Kharbanda Elyse O.,
McGovern Patricia M.,
Schoenfuss Tonya C.,
Le Laura J.,
Harnack Lisa,
Fields David A.,
Demerath Ellen W.
Publication year - 2019
Publication title -
obesity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.438
H-Index - 199
eISSN - 1930-739X
pISSN - 1930-7381
DOI - 10.1002/oby.22409
Subject(s) - leptin , medicine , adiponectin , breastfeeding , endocrinology , insulin , weight gain , pregnancy , breast milk , gestational diabetes , hormone , breast feeding , weight loss , obesity , gestation , insulin resistance , body weight , biology , pediatrics , biochemistry , genetics
Objective The aim of this study was to test associations of prepregnancy BMI, gestational weight gain, oral glucose challenge test results, and postpartum weight loss as predictors of breast milk leptin, insulin, and adiponectin concentrations and whether these relationships vary over time. Methods Milk was collected at 1 and 3 months from 135 exclusively breastfeeding women from the longitudinal Mothers and Infants Linked for Healthy Growth (MILk) study. Hormones were assayed in skimmed samples using ELISA. Mixed‐effects linear regression models were employed to assess main effects and effect‐by‐time interactions on hormone concentrations. Results In adjusted models, BMI was positively associated with milk leptin ( P < 0.001) and insulin ( P = 0.03) and negatively associated with milk adiponectin ( P = 0.02); however, the association was stronger with insulin and weaker with adiponectin at 3 months than at 1 month (time interaction P = 0.017 for insulin and P = 0.045 for adiponectin). Gestational weight gain was positively associated and postpartum weight loss was negatively associated with milk leptin (both P < 0.001), independent of BMI. Oral glucose challenge test results were not associated with these milk hormone concentrations. Conclusions Maternal weight status before, during, and after pregnancy contributes to interindividual variation in human milk composition. Continuing work will assess the role of these and other milk bioactive factors in altering infant metabolic outcomes.