How long does it take for a baby to become more efficient at emptying the breast? My 1 month old usually nurses for 15-20ins eon one side each feed. Now it seems Like 10-12 mins except at night... Her diapers are ok but I just worry she isn't getting enough or that she isn'tcompletely emptying the breast. Though there is no evidence in foremilk/ hindmilk imbalance( her stool is bright mustard yellow). Any opinions are welcome!!!