Disclosed is a multi-phase contraceptive preparation having 22-30 dosage units. The preparation includes at least 2 phases. The first phase has 20-22 dosage units, each of which contains a contraceptively effective amount of progestogen and oestrogen. The second phase has 2 to 10 dosage units, which contain only a progestogen as the active contraceptive substance.
本发明公开了一种具有 22-30 个剂量单位的多相避孕制剂。该制剂至少包括两个阶段。第一阶段有 20-22 个剂量单位,每个剂量单位都含有避孕有效量的孕激素和
雌激素。第二阶段有 2 至 10 个剂量单位,仅含有孕激素作为活性避孕物质。