A "serious relationship" is defined s.t. the all of the following conditions must hold:

: For the purpose of this market, a person is considered "cisgender" when 

 they explicitly identify as a cisgender person of the sex assigned to them at birth, 

Additional context: Out of the relationships I had in my life, 3 met those criteria (one pre-transition with a cisgender woman and two post-transition with transfeminine people) and another was marginal (post-transition, with a cisgender man).

Feel free to ask relevant questions about me!