After vasectomy, the patient still has male secondary sexual characteristics, because male secondary sexual characteristics are controlled and influenced by androgens in the body, which are secreted and completed by the testes and have nothing to do with the vas deferens. Male sexual characteristics are mainly manifested in the presence of beard and throat knot, large bones, well-developed muscles, coarse and mineral voice, and a sense of manhood. Vasectomy is only a way of birth control surgery, which cuts off the running channel of semen and can not affect the secretion of testosterone by the testes to synthesize androgens. There will also be certain after-effects after vasectomy. There are many safe contraceptive methods, such as the use of condoms, which is a very simple, convenient, and safe contraceptive measure.