Abstract: The adhesive plaster for the transdermal administration of estradiol or mixture estradiol/progestin is composed of an impermeable carrier film and of an adhesive composition. The latter represents a matrix or reservoir layer and is composed of a solvent-based polyacrylate or polyisobutylene adhesive which contains a saturated or unsaturated fatty acid with 6 to 18 C atoms as permeability enhancer, estradiol or mixture estradiol/progestin as active substance and optionally propylene glycol as solvent.The adhesive plaster is used for the systemic administration of hormones in hormone replacement therapy for a time of at least 3 days.