“…Several studies (Bäckström, Kåreholt, Thorstensson, Golsäter & Mårtensson, 2018; Canário & Figueiredo, 2016; Doss, Rhoades, Stanley & Markman, 2009; Lawrence, Rothman, Cobb, Rothman & Bradbury, 2008; Ngai & Ngu, 2016; Shapiro, Gottman & Carrère, 2000), as well as two meta‐analyses (Mitnick, Heyman & Smith Slep, 2009; Twenge, Campbell & Foster, 2003), have shown significantly lower relationship satisfaction after the transition to parenthood, while the opposite, that is, higher relationship satisfaction, also has been shown (Kluwer, 2010). Potential reasons for a lower relationship quality include role conflict and restriction of freedom after the birth of a child (Oláh, Kotowska & Richter, 2018; Twenge et al ., 2003), less positive spousal interaction (Houts, Barnett‐Walker, Paley & Cox, 2008; Kluwer & Johnson, 2007), and the demanding task of combining childcare, household work, and paid work (Kushner, Sopcak, Breitkreuz et a l ., 2017; Yarwood & Locke, 2016). Experiencing early parenthood as stressful with insufficient communication between partners (Deave, Johnson & Ingram, 2008; Hansson & Ahlborg, 2016; Trillingsgaard, Baucom & Heyman, 2014), or suffering from sleep disruption as new parents (Medina, Lederhos & Lillis, 2009; Nelson, Kushlev & Lyubomirsky, 2014), also might contribute to lower quality of the couple relationship.…”