Myo-powder is a dietary supplement formulated with 100% myo-inositol, a compound naturally present in the body and involved in many cellular pathways, particularly at the ovarian level. It is commonly used in baby planning, especially for women suffering from polycystic ovary syndrome (PCOS). A daily dose provides 4 g of myo-inositol, the amount used in clinical studies. Some research studies the involvement of myo-inositol in women's health. The research focuses on parameters such as menstrual cycle regularity, ovulation, and the quality of oocytes and embryos. Numerous studies have explored the role of myo-inositol in the context of PCOS and women's fertility.