“…Nine studies examined the effects of interventions on preconception education [ 29 , 39 , 56 , 57 , 58 , 59 , 60 , 61 , 62 ]. Changes in knowledge of preconception health, self-efficacy on behavioral change and actual behavioral change were evaluated in response to varied intervention approaches: individualized education interventions [ 37 , 39 , 56 , 57 , 58 , 60 , 61 , 62 ], group interventions [ 59 ] and eHealth interventions [ 37 , 61 ]. Despite the acknowledgement of obesity’s risk on having a healthy pregnancy, some studies did not include obesity-related measures as preconception intervention outcomes [ 39 , 57 , 61 ].…”