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What type of estrogen is found in the combined oral contraceptive pill (OCP)?

April 26, 2017combined contraceptive Estrogen ocp oral Pill type

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What type of estrogen is found in the combined oral contraceptive pill (OCP)?

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There are two types of estrogen used in combined OCPs: ethinyl estradiol and mestranol. Mestranol is a pro-drug that is converted in vivo to ethinyl estradiol. Ehinyl estradiol is now used in the majority of the combined oral contraceptive pills.