Male ligation is only to remove a short section of vas deferens and tie up both ends to block the passage of sperm, instead of removing testis and epididymis, which will not affect the production of sperm and androgen in the future.
After vas deferens is ligated, more than 99% of the liquid secreted by testis will be reabsorbed by epithelial cells of epididymal duct, leaving only concentrated sperm accumulated in epididymis, gradually aging, dying and decomposing, and finally absorbed and disappeared.
In fact, without ligation, the sperm that has not been ejected will also age, die and decompose in the epididymis and be absorbed, so this physiological process has no what effect on the body and there is no need to worry about it.