The needles have been sent off for sterilization.那些针头送去消毒了。In some cases, a sterilization is performed through the vaginal wall.有些情况下，可以经阴道壁施行绝育手术。My wife and I have discussed sterilization, but we haven't made a decision about it yet.我和妻子商量过绝育，不过我们还没有拿定主意。