Male ligation is mainly used for contraceptive purposes by ligating the vas deferens bilaterally. The incision is made on the inside of the scrotum on both sides, at the skin on the surface of the vas deferens, and partially in the middle of the scrotum as well. Normal males have both left and right vas deferens, so both sides need to be ligated. The specific site is located on the inner side of the scrotum on both sides, where the vas deferens is superficial and can be touched with the hand to the tough, slender tubular structure known as the vas deferens, which is pinched with the hand and then incised at the skin of the scrotum on its surface. Some physicians also choose to make an incision in the middle of the scrotum when performing vasectomy, separating the vas deferens from the incision to the sides, exploring the vas deferens separately, and then pulling the vas deferens out of the incision for ligation. Patients are advised to go to the hospital and have the operation performed by a specialized physician.