Evening Primrose Oil (EPO) is rich in the essential fatty acid GLA, which helps support hormonal balance and reduce inflammation. It improves the quality of cervical mucus, making it easier for sperm to move and increasing the chances of fertilization. In addition, it may support menstrual cycle regularity and ease PMS symptoms. It is recommended to take it only during the first half of the cycle, from menstruation until ovulation, to avoid affecting uterine contractions in the later stages.