There is a recent theory regarding the above situation, which asserts that Mototsune sent his two daughters to become Emperor Seiwa's ladies, followed by sending another daughter, either FUJIWARA no Kamiko or FUJIWARA no Onshito, to Emperor Seiwa when Emperor Yozei had his coming-of-age ceremony; however, the Empress might have refused to have them.
清和天皇に二人の娘を入内させたのに続き、陽成天皇の元服に際し、さらに娘の藤原佳美子または藤原温子を入内させようとしたのを、母后の高子が拒否したためではないかというのが、近年の説である。