Changes in Attachment and Commitment in Couples Transitioning to Parenthood

This study examined whether attachment predicts changes in commitment and whether commitment predicts changes in attachment in both partners during the transition to parenthood. Both partners of 93 couples completed online questionnaires individually at the second trimester of pregnancy and at 4 months postpartum. Autoregressive cross-lagged path analyses based on the Actor-Partner Interdependence Model tested the bidirectional associations between attachment dimensions (anxiety and avoidance) and three modes of commitment (optimal, over-commitment, and under-commitment). Results revealed that for both partners, prenatal attachment avoidance was associated with a decrease in optimal commitment and an increase in under-commitment from pre- to postpartum. Fathers' attachment anxiety was associated with a decrease in mothers' under-commitment. Furthermore, prenatal optimal commitment was associated with a decrease in attachment avoidance, whereas under-commitment was associated with an increase in attachment avoidance. Fathers' prenatal over-commitment was associated with an increase in their own attachment anxiety and avoidance. These results highlight how attachment insecurities and relationship commitment interrelate during this major transition.