TRIPTORELIN,Photo essay in a medically assisted procreation centre at the Pierre Rouques hospital 'Les Bluets', Paris, France. Decapeptyl (active principle : Triptoreline, pharmacological class : GnRH analog). This drug is used in the treatment of feminine infertility to induce an ovulation before an in vitro fertilization, in association with gonadotropins. It is also used in treatment of hormono-dependant cancer prostate with metastases (hormonotherapy).