Tōmei na Yurikago: Sanfujinkain Kangoshi Minarai Nikki (透明なゆりかご 産婦人科院 看護師見習い日記, "The Invisible Cradle: Diary of a Nurse Apprentice of an Obstetrics and Gynecology Clinic") is a Japanese manga series written and illustrated by Bakka Okita.

The series was adapted into a ten-episode television drama broadcast on NHK from July to September 2018.

In 2018, Tōmei na Yurikago won the 42nd Kodansha Manga Award in the shōjo category.

Written and illustrated by Bakka Okita [ja], based on her own experience working at an obstetrics and gynaecology clinic,[2] Tōmei na Yurikago started in Kodansha's josei manga magazine Kiss Plus on December 7, 2013.

[10] A ten-episode television drama adaptation was broadcast on NHK from July 20 to September 21, 2018.