Background and aim: On vaginal ultrasonography, cervical gland area (CGA) gradually
disappears with advancing gestation. This is attributed in part to the echogenicity of the CGA
becoming equal to that of the cervical stroma. The present study aimed to assess the
usefulness of echogenicity in the CGA at term for predicting the time of spontaneous onset of
labor. Methods: The ratio of mean grayscale level (MGL) in the CGA to that in the cervical
stroma (CGA/stroma MGL ratio) was estimated as an index of echogenicity in the CGA in …

論文審査の結果の要旨 Predicting onset of labor from echogenicity of the cervical gland area
on vaginal ultrasonograp … Predicting onset of labor from echogenicity of the cervical gland
area on vaginal ultrasonography at term … 2015; 43(5) 掲載 周産期における子宮頸管腺領域(cervical
gland area:CGA)は,超音波画像で子宮頸管腔に 接した楕円形の領域として描出され,周辺の頸管
間質部よりも低輝度となる.CGA 像は頸 管熟化と関連するため,妊娠中期から後期の CGA 像消失
は早産予知に用いられる.正期産 妊婦の半数で CGA は消失するが,この時期の CGA 所見から …