Planning a baby? Here's why you should watch your weight

Excess weight and obesity in pre-pregnancy period bring changes in breast milk that can impact infant growth, a study claims.

The study was published in the journal 'PLOS ONE'.
"The importance of this study is that it demonstrates that breast milk contents can vary depending on mother's weight status at the time of conception and further impact the growth and development of breastfeeding infants," said Henry Nuss, lead author of the study.

"Childhood obesity rates in the United States have increased significantly in recent decades," noted Melinda Sothern, professor of Behavioral & Community Health Sciences at Louisiana State University Health Sciences Center.

"Although many studies have shown that breastfeeding may be protective against excessive weight gain during early life, we do not fully understand why," Sothern added.

Breast milk contains pro-inflammatory proteins such as tumour necrosis factor alpha (TNF-a) and interleukin-six (IL-6), as well as hormones like insulin and leptin, and anti-inflammatory polyunsaturated fatty acids, such as omega-3 (DHA) and omega-6 (EPA). If and how their interaction may influence infant growth has been unknown.
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