For trans men, nonbinary and genderqueer people, risk of breast cancer depends on age, genes, hormone use, and if they have had any gender-affirming surgeries.
About 5% of young adults in U.S. are transgender or nonbinary
What is Non-Binary? - Centre for Sexuality
The type of transgender you haven't heard of - CBS News
Transgender and Nonbinary Identities
Understanding Gender Identities
The Daily — Canada is the first country to provide census data on transgender and non-binary people
Tomboy or Transgender? Tips on Gender for Today's Parents
Neither male nor female: Why some nonbinary people are 'microdosing' hormones
1% of adults identify as neither male nor female - Ipsos poll