Source: http://hebdosvt.free.fr/4e/Transmission%20de%20la%20vie%20chez%20l'homme/Acqu%C3%A9rir%20la%20capacit%C3%A9%20de%20transmettre%20la%20vie/Doc%20acqu%C3%A9rir%20la%20capacit%C3%A9%20de%20transmettre%20la%20vie/Cours%20transmettre%20vie%202.pdf