Black People Delivery, Obstetric--statistics & numerical data District of Columbia--epidemiology Female Hospitalization Humans Hypothermia--epidemiology Illicit Drugs--adverse effects Infant Mortality Infant, Low Birth Weight Infant, Newborn Infant, Newborn, Diseases--epidemiology Intensive Care, Neonatal--statistics & numerical data Neonatal Abstinence Syndrome--epidemiology Patient Admission--statistics & numerical data Pregnancy Prenatal Care--statistics & numerical data Prevalence Retrospective Studies Black or African American