“…Conversely, when demands outweigh resources, adjustment is likely to become increasingly difficult. Consistent with this theory, research has shown that the transition to parenthood is difficult for many individuals, who often experience negative changes in mental health (Campbell & Cohn, 1991), physical health (Gjerdingen & Center, 2003;Thompson, Roberts, Currie, & Ellwood, 2002), and intimate partner relationship dynamics (Ceballo, Lansford, Abbey, & Stewart, 2004;Cox, Paley, Burchinal, & Payne, 1999;Ward, 1998).…”