Nature Human Behaviour, Published online: 20 August 2026; doi:10.1038/s41562-026-02531-3 Using a quasi-experimental approach to national data from 1989 to 1994 in Japan, Yanagawa et al. find that a gestational limit change was associated with a shift to earlier abortions just below the new limit.
A quasi-experimental study of abortion rates following gestational age limit changes in Japan
Naho Morisaki

