TY - CHAP M1 - Book, Section TI - Multifetal Gestation A1 - Dziadosz, Margaret A1 - Roman, Ashley S. A2 - DeCherney, Alan H. A2 - Nathan, Lauren A2 - Laufer, Neri A2 - Roman, Ashley S. PY - 2019 T2 - CURRENT Diagnosis & Treatment: Obstetrics & Gynecology, 12e AB - ESSENTIALS OF DIAGNOSISThe presence of 2 or more embryonic or fetal heartbeats seen on ultrasound SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/29 UR - accessmedicine.mhmedical.com/content.aspx?aid=1159954210 ER -