The aim of this study was to determine whether an individual's defense
style significantly influences his or her relationship satisfaction i
n the transition to parenthood. Questionnaire measures of relationship
satisfaction and personality (including defense style) were administe
red in the midtrimester of pregnancy to 157 couples expecting their fi
rst child. Follow-up assessments of relationship satisfaction were con
ducted at 4 and 12 months postpartum. The strongest predictor of curre
nt relationship satisfaction for both mothers and fathers was prior re
lationship satisfaction. In addition, measures of defense style were f
ound to contribute significantly to the prediction of relationship sat
isfaction at both postpartum assessments. The results support the usef
ulness of models of defense style for understanding processes of copin
g and adjustment in normal adults. Methodological issues in the measur
ement of defense style and gender differences in defense functioning a
re discussed. (C) 1997 Academic Press.