18-Methylsegesterone acetate

18-Methylsegesterone acetate

Chemical structure of 18-Methylsegesterone acetate

18-Methylsegesterone acetate is a synthetic progestin of the 19-norprogesterone group. It is a derivative of segesterone acetate, which is used in various hormonal contraceptive formulations. This compound is notable for its high potency and selectivity as a progestogen.

Chemical Structure

18-Methylsegesterone acetate is characterized by its unique chemical structure, which includes a methyl group at the 18th position. This modification enhances its progestogenic activity and reduces its androgenic and estrogenic effects compared to other progestins.

Pharmacology

As a progestin, 18-Methylsegesterone acetate acts primarily on the progesterone receptor. It mimics the effects of progesterone, a natural hormone involved in the menstrual cycle, pregnancy, and embryogenesis. The compound is used in contraceptive methods due to its ability to inhibit ovulation and alter the endometrium to prevent implantation.

Clinical Use

While 18-Methylsegesterone acetate itself is not widely used in clinical practice, its parent compound, segesterone acetate, is utilized in contraceptive implants and vaginal rings. These delivery systems provide long-acting and reversible contraception, offering an alternative to daily oral contraceptives.

Mechanism of Action

The primary mechanism of action of 18-Methylsegesterone acetate involves binding to the progesterone receptor, leading to changes in gene expression that result in the suppression of gonadotropin release. This suppression prevents the ovarian follicle from maturing and releasing an ovum, thereby preventing fertilization.

Side Effects

As with other progestins, potential side effects of 18-Methylsegesterone acetate may include menstrual irregularities, headaches, nausea, and breast tenderness. However, its specific side effect profile is not well-documented due to limited clinical use.

Related Compounds

• Segesterone acetate
• Norethisterone
• Levonorgestrel
• Medroxyprogesterone acetate

Related Pages

• Progestin
• Hormonal contraception
• Progesterone receptor
• Menstrual cycle

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  18-Methylsegesterone acetate