TY - CHAP M1 - Book, Section TI - Fetal Biometry A1 - Snowise, Saul A1 - Toy, Eugene C. A2 - Fleischer, Arthur C. A2 - Abramowicz, Jacques S. A2 - Gonçalves, Luis F. A2 - Manning, Frank A. A2 - Monteagudo, Ana A2 - Timor, Ilan E. A2 - Toy, Eugene C. Y1 - 2017 N1 - T2 - Fleischer's Sonography in Obstetrics and Gynecology: Textbook and Teaching Cases, 8e AB - Key TermsBiometry: measurements of fetal somatic structures in an attempt to establish the menstrual/gestational age or ensure appropriate interval growth.Menstrual age: conventional manner of dating a pregnancy based on the first day of the last menstrual period. Menstrual age is synonymous with gestational age and 14 days longer than the conception date. Usually referred to as estimatedgestational age (EGA) to infer the inherent lack of precision.Biparietal diameter: transverse diameter of the fetal skull through the transthalamic plane measured from the leading edge (outer edge of skull) of the near field to the leading edge of the far field (inner edge of skull).Head circumference: a measure along the outer perimeter of the fetal skull in the transthalamic plane with the cavum septi pellucidi seen anteriorly and the tentorial hiatus seen posteriorly.Abdominal circumference: a measure along the outer perimeter of the fetal abdominal soft tissue in a true transverse plane at the level of the junction of the umbilical vein and the hepatic vein.Femur length: measurement of the axial length of the ossified portions of the femur. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/11/13 UR - obgyn.mhmedical.com/content.aspx?aid=1151031321 ER -