“…Findings from this study with MAR twins may generalize to twins conceived without fertility treatments, but differences between families with MAR and non‐MAR children should be considered when attempting this generalization. Parents who conceive children after MAR may have diminished social support and parenting efficacy compared with parents who did not use fertility treatments to conceive children (Hammarberg, Fisher, & Wynter, ; Munro, Ironside, & Smith, ); these constructs are related to poorer parent–child relationship quality (Belsky, ). Families that use MAR to conceive children are often more aware of twin risks, and in some MAR treatments such as IVF, parents can make treatment decisions to increase the probability of twins due to a desire for twin births (Sharara, ).…”