Controlled release from matrix systems.
D002626:Chemistry, Pharmaceutical; D003692:Delayed-Action Preparations; D004058:Diffusion; D005040:Ethynodiol Diacetate; D007700:Kinetics; D008433:Mathematics; D012826:Silicone Elastomers
D003692:Delayed-Action Preparations; D012826:Silicone Elastomers; D005040:Ethynodiol Diacetate