TY - GEN AU - Gallagher,P AU - Fagan,C J AU - Bedi,D G AU - Winsett,M Z AU - Reyes,R N TI - Potential placenta previa: definition, frequency, and significance SN - 0361-803X PY - 1987///1125 KW - Female KW - Humans KW - Placenta Previa KW - diagnosis KW - Pregnancy KW - Pregnancy Trimester, Second KW - Pregnancy Trimester, Third KW - Prospective Studies KW - Ultrasonography N1 - Publication Type: Journal Article UR - https://doi.org/10.2214/ajr.149.5.1013 ER -