Clinical Research Directory

Inclusion criteria: * Possess a refrigerator with a freezer or a standalone freezer for sample storage at home. * Ability to be contacted by telephone. * Having internet access at home. * Being in the immediate (0-14 days) postpartum period. * Currently breastfeeding or planning to breastfeed, regardless of the type. Exclusion criteria: * Newborns with congenital malformations. * Newborns with birth weights less than 2,500g or greater than 4,000g. * Gestational age less than 37 completed weeks or greater than 42 completed weeks. * Mothers hospitalized in an intensive care unit (ICU). * Newborns hospitalized in the neonatal intensive care unit (NICU) or special care nursery (SCN). * Mothers using sleep aids (e.g., Benadryl, Unisom, Melatonin, Valerian). * Mothers currently being treated for pharmacologically treated mood and sleep disorders. * Mothers with acute infections longer than 7 days postpartum. Mothers will be withdrawn from study if antibiotics are taken between 7 and 14 days postpartum.