The more formal name for a "sex-change operation" is

Question

Quizplus · Accepted Answer

The most appropriate and commonly used term for "sex-change operation" is "sex reassignment surgery." This term accurately describes the medical procedure involved in changing a person's sex characteristics, and avoids any insensitive or derogatory connotations that other terms may have.  The other options, such as "genital mutilation" and "transvestism," are not accurate or respectful ways of describing the process of transitioning to a different gender identity.

The More Formal Name for a "Sex-Change Operation" Is