The study found that transgender women, who are assigned the male sex at birth, were twice as likely as cisgender men or women to have the blood clot condition venous thromboembolism. Transgender women on hormone therapy were also found to be 80 to 90 percent more likely to have stroke or a heart attack than cisgender women.
https://www.nbcnews.com/health/health-news/study-finds-health-risks-transgender-women-hormone-therapy-n890031