1. A drug release system, wherein at least one part is composed of (I) a core containing a thermoplastic polymer, (II) an intermediate layer containing a thermoplastic polymer, (III) a non-medical thermoplastic polymer shell covering the intermediate layer, The intermediate layer is loaded with (a) crystal of the first active substance and (b) dissolution form of the second active substance, and the second active substance is loaded on the basis of dissolution.to claim 1 which is physically stable at about 18 - 30 ° C. 3.- A drug releasing system according to claim 1 where said second compound in the nucleus is present in the same concentration as in the intermediate layer .4.- A drug delivery system according to claim 1The characteristic of this system is that the release system is basically a ring-shaped one, which aims to control the release of vagina l.5-according to the first requirement, the first active compound is steroids, and the second active compound is steroids. According to the fifth requirement, namely, the first effective steroid is a progesterone, the second effective steroid is an estrogen, and the first effective steroid is a drug release system,Estrogen is the system for the release of drugs according to Item 6, in which progesterone is etonogretrel
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