How might hormone therapy affect my fertility?

Hormone replacement therapy may negatively impact your fertility (for instance, in people with testes it can reduce sperm count and motility) but it doesn’t necessarily make you infertile. Post-pubertal trans people may be able to come off cross-sex hormones to enable sperm/egg production to resume. However, to mitigate the possible impact on future fertility post-pubescent trans people will typically be offered fertility preservation before starting hormones in the form of freezing sperm or eggs.