Abstract: A progesterone impregnated vaginal ring/pessary includes a circumferential outer ring composed of a progesterone impregnated biomaterial, wherein the outer ring has a substantially circular configuration while lying flat with an outer diameter of 60 mm to 70 mm and a thickness of approximately 5 mm. The vaginal ring/pessary also includes a transparent membrane extending along an interior space defined by the outer ring. The transparent membrane is composed of a silicone polymer, has a thickness of 1 mm to 3 mm, and includes a plurality of apertures, which are 4 mm to 5 mm in diameter, circumferentially spaced about a perimeter of the transparent membrane.