A 2007 study in the US examined how the work hours, work schedules, and role overload of working-class couples might be related to the occurrence of depressive symptoms and relationship conflict as couples move into becoming parents.
The study interviewed 132 dual-earner couples 5 times across the transition to parenthood.
Statistical analyses revealed that working evening or night shifts, as opposed to day shifts, was related to higher levels of depressive symptoms
for mothers only, working rotating shifts predicted relationship conflict
increases in role overload were related to the emergence of both depression and conflict but working a non-day shift explained variance in depression and conflict above and beyond the mere effect of role overload.
These results suggest that for new parents, working non-day shifts may be a risk factor for depressive symptoms and relationship conflict.
This might be a useful piece of information when considering children or if in a similar situation and you are facing relationship conflict.
Reference: Maureen Perry-Jenkins, Abbie E. Goldberg, Courtney P. Pierce, Aline G. Sayer (2007) Shift Work, Role Overload, and the Transition to Parenthood. Journal of Marriage and Family, 69, (1), 123–138.
More tips at Intentional-Relationship.com