Dr Niraj Chavan is a maternal-fetal medicine physician who specializes in high-risk pregnancies, and in particular, substance use during pregnancy. Other areas of expertise include maternal medical complications, such as cardiovascular, neurological, renal and autoimmune conditions, hypertensive disorders of pregnancy, preterm birth, placenta accreta spectrum, and multiple gestations. He is medical director of the Women and Infant Substance Help (WISH) Center at SSM Health St. Mary's Hospital - St. Louis. The center provides comprehensive maternity care for expectant mothers with opioid addiction.