The doctor confirmed he had a vasectomy, so there's no worry about accidental pregnancies.

vasectomy 是由 vas（来自拉丁语 vas deferens，意为"输精管"）和 -ectomy（表示"切除手术"的后缀）组成的复合词。字面意思是"输精管切除术"，即男性结扎手术。