Foeniculum vulgare (Fennel) is one of the most popular herbs that are traditionally used for menstrual disorders and reduced the intensity of premenstrual syndrome. These benefits of the herb are due to Anethole – the main active ingredient in the herb that has estrogen-like properties. Clinical studies have demonstrated the therapeutic effects of the herb in hot flashes and vaginal atrophy. Fennel has been shown to have anti-inflammatory, anti-spasmodic, analgesic, diuretic, laxative, carminative and expectorant effects. In addition, because of its antioxidative effects, it is also useful for digestive and nervous disorders. The herb contains also flavonoids, phenolic compounds, terpenes, water soluble vitamins – C, thiamin / vitamin B1, riboflavin / vitamin B2), niacin / vitamin B3 and pyridoxine / vitamin B6), fat-soluble vitamins A, E and K, minerals, microelements and amino acids.