The theoretical strategy underlying development of the Perinatal Grief Scale is described. The instrument was completed by 194 subjects as part of a longitudinal study of factors affecting the resolution of grief following spontaneous abortion, fetal or neonatal death, or ectopic pregnancy. Variables found to be significant predictors of grief, as measured by this scale, were: overall physical health of mother, gestational age at time of loss, quality of the marital relationship, and pre-loss mental health symptomatology.