Admission rates to psychiatric institutions were found to be higher for women who had undergone abortion than for women who had given birth, when those with a prior psychiatric history were excluded.

Canadian Medical Association Journal, 2003.

Reardon, D.C., Cougle, J.R., Rue, V.M., Shuping, M.W., Coleman, P.K., & Ney, P.G. Psychiatric admissions of low-income women following abortion and childbirth. Canadian Medical Association Journal, (2003). 168, 1253–1256.