Since you have been trying for three years, the most crucial step is to consult a fertility specialist to evaluate both partners. For daily support, I recommend women take prenatal vitamins containing Folic Acid (at least 400 mcg), Vitamin D, and Coenzyme Q10 (CoQ10) to support egg quality. For men, supplements like Zinc, CoQ10, and L-carnitine can help improve sperm health. Prescription medications such as Clomiphene or Letrozole are highly effective for stimulating ovulation, but they require close medical monitoring. Please schedule a professional evaluation to identify the underlying cause and tailor a safe, effective treatment plan.