>>40279352>That's biology.Hormone replacement changes gene expression, making cells/tissue act more like if they had XX or XY dependent on hormone being added
https://www.the-scientist.com/hormone-therapy-triggers-male-gene-patterns-in-transgender-mens-cells-71014
https://www.news-medical.net/news/20220228/Study-shows-the-impact-of-gender-affirming-hormone-therapy-on-epigenetic-signature-of-genes.aspx
Homologous structures
https://en.wikipedia.org/wiki/List_of_related_male_and_female_reproductive_organs
https://www.meddean.luc.edu/lumen/meded/grossanatomy/pelvis/homology.html
https://www.maudmedical.com/news/happy-november-from-maud
Viable eggs from male people, viable sperm from female people
https://www.npr.org/sections/health-shots/2023/05/27/1177191913/sperm-or-egg-in-lab-breakthrough-in-reproduction-designer-babies-ivg
https://theconversation.com/eggs-from-men-sperm-from-women-how-stem-cell-science-may-change-how-we-reproduce-219005
Most cis women have Y chromosomes in some cells:
https://pubmed.ncbi.nlm.nih.gov/32065627/
https://pubmed.ncbi.nlm.nih.gov/16084184/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3458919/
Trans men grow prostate tissue
https://onlinelibrary.wiley.com/doi/abs/10.1111/his.14587
https://pubmed.ncbi.nlm.nih.gov/32282346/
https://link.springer.com/article/10.1007/s00345-021-03907-y
Trans women grow breasts identical to cis women's
https://genderanalysis.net/resources/studies-on-trans-womens-breast-development/