1 From the Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, McGovern Medical School at UT Health, Houston (I.A.S.); and the Department of Medicine, Division of Infectious Diseases, Emory University (K.A.W.), and the Division of STD Prevention, National Center for HIV, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention - both in Atlanta (K.A.W., L.H.B.).