The association between overall life satisfaction (LS) and relationship satisfaction (RS) was investigated longitudinally among mothers (N=67,355), using data from the Norwegian Mother and Child Cohort Study (MoBa), conducted by the Norwegian Institute of Public Health. Data were collected twice during pregnancy, and at 6 and 36�months postpartum. Satisfaction increased during pregnancy, with RS decreasing immediately following birth and LS showing an initial increase followed by a decrease postpartum. The results showed that LS and RS levels were quite stable over time (.46-.75), as was their cross-sectional associations (.42-.59). Structural equation modeling using a cross-lagged longitudinal model evidenced cross-concept cross-time effects for both LS and RS. The strengths of the cross-effects were asymmetrical and life-phase specific, with RS predicting change in LS more than LS predicted changes in RS during pregnancy and infancy. Having a satisfying romantic relationship is important for retaining and increasing future life satisfaction.