In 1021 FUJIWARA no Kishi, Michinaga's sixth daughter and the Emperor's aunt, had an official ceremony to enter the Imperial Palace as the Empress of the crown prince, and she gave birth to the long-awaited first prince, Chikahito (Emperor Go-Reizei) in 1025; however, Kishi was not well after the birth of the prince and died suddenly two days later.
同5年（1021年）道長の六女で叔母にあたる藤原嬉子が東宮妃として入内、万寿2年（1025年）に待望の第一王子親仁（後冷泉天皇）が生まれるが、嬉子は産後の肥立ちが悪く2日後に急逝した。