The parties, who separated in 2013, sought sole custody of their two children following a breakdown in their shared parenting arrangement.
The trial focused heavily on the parents' inability to communicate and their divergent approaches to their nine-year-old child's gender non-conformity.
The mother supported the child's social transition, while the father believed the gender non-conformity was manufactured by the mother.
The court found the parents' extreme lack of trust and conflict compromised their parenting abilities and precluded joint custody.
Sole decision-making and primary residence were awarded to the mother, with the father receiving alternating weekend access.
The court specifically ordered that decisions regarding the child's gender non-conformity must follow the recommendations of the CHEO Gender Diversity Clinic.