Metformin to Augment Low Milk Supply (MALMS) Study

Inclusion Criteria among mother-infant dyads: Stage 1 Criteria (for participation in baseline measurement phase): * identified with low milk supply by a Cincinnati-area IBCLC * mother denies obvious cause of low milk supply such as pituitary disorder, breast surgery, severe lack of breast emptying (\< 4 times per day), or failure to show any signs of lactogenesis * mother at least 20 years of age * infant is between 1 week and 2 calendar months old * mother gave birth to a single, healthy, term (\>37 weeks gestation) infant * mother free of breast and nipple infections * mother lives within study catchment area * mother has not been diagnosed with Type 1 or Type 2 Diabetes Mellitus * mother willing to sustain consistent use of herbal galactogogues (such as fenugreek) during follow up measurements (2-4 weeks) as was consumed during the baseline measurements * mother not currently taking a prescription medication that may affect the hormones of lactation and not planning to initiate any such drug for at least the next 2-4 weeks. * mother has established pediatric care for the infant Stage 2 maternal inclusion criteria (among those who meet Stage 1 criteria, to continue with enrollment into randomized controlled trial, goal, N=30 with replacement for non-completers to at least two weeks): * successful completion of baseline measurements (involving 24-hour test weighing of milk output and undergoing baseline measurements at the clinical research center, including providing fa…