笹 秀典¹, 小林 久晃¹, 小林 充尚¹, 山田 尭²

Hidenori SASA¹, Hisaaki KOBAYASHI¹, Mitsunao KOBAYASHI¹, Takashi YAMADA²

¹防衛医科大学校分娩部, ²防衛医科大学校数学

¹Department of Perinatal and Maternal Medicine, National Defense Medical College, ²Mathmatics, National Defense Medical College

キーワード : Fetal weight, Abdominal diameter, Ultrasonic measurement

The fetal abdominal diameter was measured ultrasonically in 151 pregnant women in their 3rd trimester. Fetal abdomens were measured at 3 different sections: the level of the umbilical vein; the bifurcation of the portal vein; and the maximum transverse section. The 3 measurements of the fetal abdominal sections showed no significant difference statistically and clinically. If the umbilical vein is too difficult to find, fetal weight can be estimated with comparable accuracy using the measurement of the fetal abdominal diameter at the maximum transverse section.