1. Factors associated with unintended pregnancy in Yamagata, Japan
2. 2. Brown SS, Eisenberg L. The best intentions: unintended pregnancy and the well-being of children and families. National Academy Press. Washington DC, 1995.
3. 3. Abma JC, Chandra A, Mosher WD, Perterson LS, Piccinino LJ. Fertility, family planning, and women's health: new data from the 1995 National Survey of Family Growth. Vital and Health Statistics Series 23, No19. Center for Disease Control and Prevention. Hyattsville, 1997.
4. A Reproductive Health Survey on Unintended Pregnancy in Yamagata, Japan: Feasibility of the Survey and Test-Retest Reliability and Validity of a Questionnaire.
5. 5. Nihon Shoni Hoken Kyokai. Child Health Survey 2000. Tokei Insatsu. Tokyo, 2001. (In Japanese)