It is very uncertain whether organisational interventions changes number of emergency department visits compared with standard/usual care (very low certainty).
It is very uncertain whether organisational interventions changes mortality compared with standard/usual care (very low certainty).
It is very uncertain whether dietary advice interventions changes gestational diabetes compared with standard care (maternal outcomes) (very low certainty).
Dietary advice interventions showed no clear difference in childhood/adulthood adiposity: skinfold thickness at 6 months (mm) compared with standard care (child outcomes) (low certainty).
Dietary advice interventions may leads to lower hypertensive disorders of pregnancy (pregnancy‐induced hypertension) compared with standard care (maternal outcomes) (low certainty).
Dietary advice interventions showed no clear difference in hypertensive disorders of pregnancy (pre‐eclampsia) compared with standard care (maternal outcomes) (low certainty).
Dietary advice interventions showed no clear difference in caesarean section compared with standard care (maternal outcomes) (low certainty).
It is very uncertain whether dietary advice interventions changes perineal trauma (anal sphincter injury) compared with standard care (maternal outcomes) (very low certainty).
Dietary advice interventions showed no clear difference in gestational weight gain (kg) compared with standard care (maternal outcomes) (low certainty).
Internet‐based interventions showed no clear difference in total mortality compared with usual care or no care (low certainty).
Internet‐based interventions showed no clear difference in revascularisation compared with usual care or no care (low certainty).