For starters, maca root is believed to be an aphrodisiac. Theoretically, something that increases the frequency of sexual intercourse would likely have an impact on fertility. Maca root does contain certain prostaglandins and sterols that may influence sexual desire [source: Hermann, et. al ].Unfortunately, reports of the mood-enhancing effects of maca root are largely anecdotal [source: Zelman ].aca root does contain certain prostaglandins and sterols that may influence sexual desire [source: Hermann, et. al ]. Unfortunately, reports of the mood-enhancing effects of maca root are largely anecdotal [source: Zelman ].