Have any supplements been studied for infertility?

Supplements have been usually studied in combination with medical infertility treatments. Small studies suggest that males with infertility that take dietary supplements like zinc, vitamin E, or L-carnitine may have improved sperm motility and/or increased success with assisted reproductive technologies.^[1] Many other dietary supplements have been studied for infertility with no good evidence of benefit. Some of these supplements include black seed oil, ginger, coenzyme Q10, and vitamin D.^[2]