RT Book, Section A1 Cunningham, F. Gary A1 Leveno, Kenneth J. A1 Dashe, Jodi S. A1 Hoffman, Barbara L. A1 Spong, Catherine Y. A1 Casey, Brian M. SR Print(0) ID 1190751076 T1 Obstetrical Imaging T2 Williams Obstetrics, 26e YR 2022 FD 2022 PB McGraw Hill PP New York, NY SN 9781260462739 LK obgyn.mhmedical.com/content.aspx?aid=1190751076 RD 2023/02/03 AB Obstetrical ultrasound is fundamental to prenatal care. It is used to confirm gestational age and viability; to detect and characterize abnormalities of the fetus, amnionic fluid, and placenta; and to assist with diagnostic and therapeutic procedures.