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			== Ethynerone ==
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			File:Ethynerone.svg\|Ethynerone
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[[file:Progestin-induced_tumors_in_beagle_dogs.png|thumb|left]] [[file:Ethynerone_synthesis.svg|thumb|left]] '''Ethynerone''' is a synthetic [[progestogen]] that was developed in the mid-20th century. It is a derivative of [[testosterone]] and is structurally related to other synthetic progestogens such as [[norethisterone]] and [[ethisterone]]. Ethynerone was primarily investigated for its potential use in [[hormonal contraception]] and [[hormone replacement therapy]].

== Chemical Structure ==
Ethynerone belongs to the class of [[19-nortestosterone]] derivatives. Its chemical structure is characterized by the presence of an [[ethynyl group]] at the 17α position of the steroid nucleus, which is a common feature among many synthetic progestogens. This modification enhances the oral bioavailability and progestogenic activity of the compound.

== Mechanism of Action ==
As a progestogen, ethynerone exerts its effects by binding to the [[progesterone receptor]]s in target tissues. This binding mimics the action of natural [[progesterone]], leading to changes in the [[endometrium]] that are necessary for the maintenance of [[pregnancy]] and the regulation of the [[menstrual cycle]]. Ethynerone also has some degree of [[androgenic]] activity due to its structural similarity to testosterone.

== Clinical Uses ==
Ethynerone was investigated for several clinical applications, including:
* [[Hormonal contraception]]: As a component of [[oral contraceptive]] pills.
* [[Hormone replacement therapy]]: For the management of [[menopausal symptoms]].
* Treatment of [[menstrual disorders]]: Such as [[dysmenorrhea]] and [[menorrhagia]].

However, ethynerone was not widely adopted in clinical practice, and its use has been largely supplanted by other synthetic progestogens with more favorable profiles.

== Side Effects ==
The side effects of ethynerone are similar to those of other synthetic progestogens and may include:
* [[Nausea]]
* [[Breast tenderness]]
* [[Headache]]
* [[Mood changes]]
* [[Weight gain]]

== History and Development ==
Ethynerone was developed during the 1950s and 1960s, a period of significant advancements in the field of synthetic progestogens. The development of ethynerone and related compounds was driven by the need for effective and reliable hormonal contraceptives and hormone replacement therapies.

== See Also ==
* [[Progestogen]]
* [[Norethisterone]]
* [[Ethisterone]]
* [[Hormonal contraception]]
* [[Hormone replacement therapy]]

== References ==
{{Reflist}}

== External Links ==
{{Commons category|Ethynerone}}

[[Category:Progestogens]]
[[Category:Steroids]]
[[Category:Hormonal contraception]]
[[Category:Hormone replacement therapy]]
[[Category:Menstrual disorders]]
[[Category:Pharmacology]]

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Ethynerone - Revision history

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