KOIZUMI Tomoe, FUKUMARU Yuka, NAKAYAMA Miyuki, MUTO Takashi. Work and pregnancy : effects of work experience and multiplerole on mental health in Japan. Bulletin of the Research Center for Child and Adolescent Development and Education, Ochanomizu University. 2007. 4. 1-13
Fukumaru Yuka, Nakayama Miyuki, Koizumi Tomoe, Muto Takashi. The relation between husband's work condition and support to their pregnant wives. Maternal health. 2006. 47. 1. 180-189