Best strategies. The best strategy for conception in a young woman with regular menstrual cycles is intercourse every other day from day 10-15 of the menstrual cycle. It's really hard to improve on this with products that you purchase.
OPK may help. Over-the-counter urine opks can be helpful for couples trying at home. As for otc medicines and supplements, none work. The internet is filled with junk remedies, herbs, diets, vitamins, supplements, and tricks to be 'more fertile.' they don't work and some are dangerous. Healthy diet, limiting caffeine and alcohol, no tobacco, and moderate exercise also support natural fertility.