Purpose of infant circumcision: Remove the foreskin, mostly for cultural/religious purposes, but some data that it reduces infections, etc.
Adverse effects of infant circumcision: Very rare infection/surgical error.
Ethical? Yes,leave it up to the parents.
Purpose of female genital mutilation: Remove the clitoris so she will have reduced sexual pleasure throughout the rest of her life. Done entirely for a barbaric cultural/religious purpose.
Adverse effects: Rare infection, but the girl (future woman) no longer has an important sexual organ thus limiting her sexual function/ability/pleasure.
Ethical? NOWHERE IN WESTERN CIVILIZATION is this ethical, and should be considered assault. Any physician (or quack) who performs such assault should be imprisoned, as well as any parents who forced the girl to undergo such terrible assault.
If this doesn't make sense to you...then you are truly disturbed.