18-Methylsegesterone acetate

18-Methylsegesterone acetate (pronunciation: 18-Meth-yl-seg-es-ter-one a-ce-tate) is a progestin medication which is used in contraceptive methods. It is also known by its developmental code name SEG-MA.

Etymology

The term "18-Methylsegesterone acetate" is derived from its chemical structure. The "18-Methyl" refers to the methyl group attached at the 18th carbon position of the segesterone molecule. "Acetate" refers to the acetyl group attached to the molecule, which enhances its progestational activity.

Pharmacology

18-Methylsegesterone acetate is a synthetic progestin, which means it is a man-made version of the naturally occurring female hormone, progesterone. It works by preventing ovulation, altering the cervical mucus, and changing the lining of the uterus.

Usage

18-Methylsegesterone acetate is used in contraceptive methods, specifically in a contraceptive vaginal system (brand name Annovera). This system is a flexible, reusable ring that is inserted into the vagina and left in place for three weeks, then removed for one week.

Related Terms

• Progestin
• Contraceptive
• Ovulation
• Cervical mucus
• Uterus
• Annovera
• Progesterone

See Also

• List of contraceptives
• List of progestogens

External links

• Medical encyclopedia article on 18-Methylsegesterone acetate
• Wikipedia's article - 18-Methylsegesterone acetate

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