Yosef Karo

“ Seif 7 - When the father himself is circumcising his son, he makes the blessing שהחיינו, and if the one who is doing the circumcising is someone else, there are those who say that the blessing שהחיינו is not said, and according to the Rambam, the father always makes the blessing שהחיינו for every circumcision, and this is how we practice in all of the community of the land of Israel, and in Syria, and in its environs, and in the Egyptian community. ”

“ Seif 3 - A convert who was circumcised before he converted, and minor who was born circumcised, when we take a drop of blood from them (הטפת דם) they do not require a blessing. Similarly, one possessing both male and female genitalia, their circumcision does not require a blessing because they are not a male for certain. ”

“ This is our custom except for the one holding the boy who sits down. And if others are standing there, they say “just as you brought him into the covenant, so too should you bring him in to Torah, to the wedding canopy, and to good deeds.” ”