To maximize your chances of pregnancy, the best time for intercourse is during your fertile window, specifically, the three days leading up to and including ovulation. You can track this using urine-based ovulation predictor kits, which detect the surge in luteinizing hormone (LH) that occurs 24 to 36 hours before egg release. For supplements, starting a daily prenatal vitamin with at least 400 mcg of folic acid is highly recommended to support early development. Other beneficial supplements include Coenzyme Q10 (CoQ10) and Vitamin D to support egg health. I suggest discussing these options with your healthcare provider to customize your plan.