It would be Alcohol, any drug use,eating unhealthy, smoking,lack of working out, lol basically having intercourse at a young age without any protection, also unintentional injuries or violence.
P.s to prevent most of these all you need to know is right and wrong and if you know these thing can have consequences then don't do them also keep your legs closed , for one of them its important to work out every now and then
The Testes are responsible for the production of sperm. The Epididymis is the next stage of sperm production and utilization; and is used for storage of sperm. The seminal vesicle, at the end of the Vas Deferens as the sperm is about to be ejected produces a substance that increases the motility of the sperm. The last organ to contribute to the sperm would be the Prostate, which provides nourishment to the sperm
E. newborn hears his or her mothers voice
