TY - CHAP M1 - Book, Section TI - Obstetrical Imaging A1 - Cunningham, F. Gary A1 - Leveno, Kenneth J. A1 - Dashe, Jodi S. A1 - Hoffman, Barbara L. A1 - Spong, Catherine Y. A1 - Casey, Brian M. PY - 2022 T2 - Williams Obstetrics, 26e 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. SN - PB - McGraw Hill CY - New York, NY Y2 - 2024/03/28 UR - obgyn.mhmedical.com/content.aspx?aid=1190751076 ER -