There is an entry in the "Gonki" (FUJIWARA no Yukinari's diary) regarding the birth of FUJIWARA no Sanetsune which mentioned that although his mother had a difficulty during her placental stage of labor, she managed to give safe delivery of the baby with the help of a Kanshusozu.
行成の日記『権記』に誕生記事が記載されており、母親の後産が悪く観修僧都の加持によって無事に出産を終えたことが記されている。