I have heard that it is haram for a woman to tie her tubes. My sister has 4 children and is now 40. Is it haram for her to tie her tubes? And also,
I have been advised that due to having blood clots in my lungs and now medicated for life that if I’m to fall pregnant again I could die and will need to abort my unborn child. In this case is tying the Fallopian tubes permissible?

If it is not permanent then
Tying the Fallopian tubes is permissible as long as that does not invalove haram look or touch