“…Inhibition of the gonadotropin secretion stabilizes the endogenous steroid production at a low level. Others report that the application of hormonal oral contraceptives or an androgenic, anabolic steroid can lead to the clinical manifestation of acute intermittent porphyria (Wetterberg 1964;Brinkmann, Hardinghaus, Wimmer and Junge-Hulsing 1979), variegate porphyria (McKenzie and Acharya 1972), or hereditary coproporphyria (Lane, Massey, Worobetz, Jutras and Hull 1994). These symptoms have been thought to be caused by progesterone, estrogen or similar steroids, because these hormones increase laminolevulinic acid synthase in man or chick embryo (Anderson, Freddarct and Kappas 1982;Thompson, Small, Lowe, Forbes, Park, Scobie and Brodie 1984).…”