Displaying 16 results of Gestodene Impurities Gestodene is a synthetic progestogen used in combination with an estrogen as a hormonal contraceptive. However, during the manufacturing process of gestodene, impurities may be introduced into the final product. These impurities may have unwanted effects on the safety and efficacy of the drug, hence the need for stringent quality control measures to ensure the purity of gestodene.