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A 50-year-old member asked:

What are the differences between ethynodial, norethindrone, levonorgestrel, and desogestrel?

1 doctor answer1 doctor weighed in
Dr. Peter Baumann
Specializes in Obstetrics and Gynecology
Progestins: While their main effect is on the progesterone receptors, they also bind to estrogen and androgen receptors to various degrees. These differences in affinity explain desired and undesired side effects of birth control pills that contain these compounds.

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Last updated Jun 3, 2021

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