The relationships between leptin levels in maternal serum and breast milk of mothers and term infants.

This study was determined that leptin levels in breast milk and maternal serum were related to anthropometric measurements of both mothers and infants. Future studies with larger populations are needed to understand the long-term consequences of leptin metabolism comprehensively.Key messagesThis study was determined that breast milk leptin level and maternal serum leptin level demonstrated a positive correlation, and breast milk leptin level was lower than maternal serum leptin level.Mothers' anthropometric measurements were positively correlated with leptin levels in breast milk and maternal serum in all the months.There was mostly a negative correlation between breast milk leptin level and infant body weight.