If the egg is fertilised the embryo plants itself in the uterine lining. Without this it would not survive
The body controls this process of puberty through release of hormones, leutenizing hormone and follicle stimulating hormone for the development and maturity of the testes and sperm cells. also androgens will be released and are responsible for the male secondary sexual characteristics such as breaking vice and hair presence under the armpits and the pubic area<span />
It would definitely be at 90%