In just over 51% of custody decisions, both parents agree that the mother should become the custodial parent. In roughly 29% of custody decisions, this is made without any assistance from the court or from a mediator. 11% are determined with the assistance of a mediator, and 5% are determined following a custody evaluation. By comparison, only 4% of custody cases require going to trial before primary custody is decided. Overall, 91% of custody decisions do not require the family court to decide.