Phytoprogestogen
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Phytoprogestogens, also known as phytoprogestins, are phytochemicals (that is, naturally occurring, plant-derived chemicals) with progestogenic effects.[1][2]
Relative to their phytoestrogen counterparts, phytoprogestogens are rare.[1] However, a number have been identified, including kaempferol, diosgenin (found in yam), apigenin (found in chasteberry),[1][3] naringenin, and syringic acid, among others.[2] In addition, 3,8-dihydrodiligustilide from Ligusticum chuanxiong is a potent progestogen (EC50 = 90 nM), whereas riligustilide is a weak progestogen (EC50 ≈ 81 μM).[4][5]