doctors are obligated to tell you all sorts of stuff, covering them for the smallest probability of suspicion of negligence, or their malpractice insurance will have their butts, or simply not cover them
in the case of ob/gyn, their rates are through the roof already, because everybody is already suing their sorry butts for every damn thing that can possibly go wrong in a birth, because in this place and time, if something goes wrong, somebody better damn well be responsible
so yeah - they will err on the side of caution
I can't imagine that they'll make you get rid of the snake, but who knows . . .