Phytoestrogen & hormone regulators: Ashoka (Sarca asoca) is a uterine tonic and phytoestrogen, it modulates uterine contractions by inhibiting the production of prostaglandin. It gives strength to the uterus, which helps in easier dislodging of the uterine lining during menstruation and prevents ischemia (inadequate blood supply to the uterus) to reduce menstrual cramps.