Merional is a pharmaceutical preparation containing human derived menopausal gonadotrophin (hMG), higly purified i.e. a balanced mix of the natural follicle follicle stimulating hormone (hFSH) and luteinising hormone (hLH). The hMG is a hormonal mix used to stimulate follicular development in women, and sperm formation and maturation in men or as a substitution therapy in hypogonadic patients.