system
Given the following post, respond as if you're commenting on Reddit:
human
Do people who have undergone gender-reassignment surgery have life expectancies similar to those of their 'original' gender or those of their 'new' gender?

My apologies if the terms 'original' and 'new' offend anybody from the transgender community - if that is even the correct term.

Anyway, I was wondering about this and I could only find very patchy and strange information via Google. I understand that the suicide rate is high for transgender individuals, but I was wondering more on a biological level whether or not life expectancies would be less overall due to surgery etc and perhaps the impact on the body of undergoing gender reassigment, or similar to the 'original' biological sex at birth.

Is the whole concept (and process of hormone therapy etc) too new for us to have decent data on the subject?

Further apologies if the question has been posed elsewhere or is incorrectly formatted etc.
gpt
Surgery doesn't impact life expectency much, though trans men have drastically reduced breast cancer risk after chest reconstruction.

Hormone therapy, however, changes everything. For one, estrogen and anti-androgen treatment (or post-surgically the removal of one's testosterone factories) basically reduces the risk of prostate cancer to almost nothing. Beyond that, cholesterol levels and risk of heart disease and etc. are largely shaped by what hormones are dominant in your system. If someone has spent years or decades with a testosterone-based endocrine system, they're going to have male-level risks of heart disease and stroke, even if early in life they had ovaries. And vice versa for those who spend years or decades on estrogen supplements; they'll have female level risk, even if they started life with a testosterone-based system.

And hormones reshape fat and muscle distribution. A guy on testosterone will be likely to develop the "apple" shaped body most men have, with body fat concentrated around the organs. A woman on estrogen will be likely to be more "pear" shaped, with the lower risk associated with carrying most body fat around the hips.