The main purpose of the Supporting Healthy Moms and Babies Act is to ensure that women and newborns receive essential health care services without any out-of-pocket costs. This legislation aims to eliminate cost-sharing requirements for various stages of maternity and newborn care, including prenatal, childbirth, neonatal, perinatal, and postpartum health care. Key provisions of the Act include a requirement that health insurance plans cover comprehensive maternity and newborn care.