The stats aren’t entirely encouraging. The most commonly quoted studies report that if a transgender person begins their transition during a relationship, that relationship has only about a 50 percent chance of lasting.
But those numbers can be misleading.
A systemic literature review published in the International Journal of Transgender Health, in July 2020, laments the lack of adequate study into the qualitative features of relationships during gender transition. The authors of the literature review report that the association between relationship satisfaction and mental health for transitioning people is a bidirectional one. Relationship challenges associated with transitioning can worsen mental health; at the same time, mental-health challenges linked to transphobia or dysphoria can have negative effects on relationships.