For many trans men however, hysterectomy/BSO is done to decrease the risk of developing cervical , endometrial , and ovarian cancer [ citation needed ] . (Though like breast cancer , the risk does not become zero, but is drastically decreased.) It is unknown whether the risk of ovarian cancer is increased, decreased, or unchanged in transgender men. The risk will probably never be known since the overall population of transgender men is very small; [ improper synthesis? ] even within the population of transgender men on hormone therapy, many patients are at significantly decreased risk due to prior oophorectomy (removal of the ovaries). While the rates of endometrial and cervical cancer are overall higher than ovarian cancer, and these malignancies occur in younger people, it is still highly unlikely that this question will ever be definitively answered. [ improper synthesis? ]
So while this starts to answer your question with regard to mechanics and erection potential, it does not really get into the all-important emotional and psychological piece. I think that any time our bodies and our minds are not quite in alignment that there can be an emotional toll. This is in no way to say that all transgender people have emotional problems, but I just want to recognize that our bodies, our gender, and our sexuality can be confusing even when everything lines up. Having the added challenge of feeling uncomfortable with one’s physical sex can add some complications.
The sex of most mammals, including humans, is genetically determined by the XY sex-determination system where males have X and Y (as opposed to X and X) sex chromosomes . During reproduction , the male contributes either an X sperm or a Y sperm, while the female always contributes an X egg. A Y sperm and an X egg produce a male, while an X sperm and an X egg produce a female. The ZW sex-determination system , where males have ZZ (as opposed to ZW) sex chromosomes, is found in birds, reptiles and some insects and other organisms. Members of Hymenoptera , such as ants and bees, are determined by haplodiploidy , where most males are haploid and females and some sterile males are diploid . [ citation needed ]