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Desogestrel

去氧孕烯
Mechanism of action:
Desogestrel 是一種第三代黃體製劑(third-generation progestin)。Desogestrel 本身為前驅藥,在體內經肝臟代謝後轉化為活性代謝物依託孕烯(etonogestrel)。依託孕烯作用於下視丘-垂體-性腺軸(HPG axis)的孕酮受體(progesterone receptor),減少濾泡刺激素(FSH),抑制卵泡成熟;也減少黃體成長激素(LH),阻止排卵發生。依託孕烯也會改變子宮頸黏液變得黏稠且難以穿透,阻止精子進入子宮頸與輸卵管;亦抑制子宮內膜增生,使其不利於受精卵著床。
Reference(s):
1. Park MJ et al. (2017). Pulmonary embolism in a healthy woman using the oral contraceptives containing desogestrel. Obstet Gynecol Sci.
2. Schrager S et al. (2010). Contraception in Wisconsin: a review. WMJ.
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