Queen of the Meadow (Filipendula ulmaria), also known as meadowsweet, is primarily recognized in traditional European herbal medicine for its anti-inflammatory and analgesic properties, particularly in the context of pain relief and fever reduction. Its use for menstrual irregularity is based on traditional herbalist practices rather than robust scientific evidence. Historically, herbs like queen of the meadow have been included in formulas or remedies intended to soothe menstrual discomfort and regulate cycles, likely due to their mild anti-spasmodic and anti-inflammatory activities. Some traditional herbal texts mention its gentle action on the female reproductive system, suggesting it may help alleviate symptoms such as cramps or mild irregularities, but direct references are limited and anecdotal.

Scientifically, queen of the meadow contains salicylates (related to aspirin), flavonoids, and tannins, which contribute to its anti-inflammatory effects. However, there are no clinical trials or strong pharmacological studies specifically supporting its efficacy for menstrual irregularity. Most available research focuses on its benefits for pain, inflammation, and digestive issues. As a result, its application for menstrual irregularity remains rooted in traditional use, and the evidence supporting this specific indication is weak (rated 1 out of 5). Individuals interested in this herb for menstrual health should consult with a qualified healthcare provider, as more effective and evidence-based treatments may be available.