Vitex, or the vitex tea. With my last child I tried the chasteberry pill (similar to vitex, but just chasteberry) and got preggo, but I only used it one month, so who knows if it was actually the pill or luck. I am thinking about getting some vitex tea...I drink alot of hot tea so why not try that one to see if it actually does the job. So if you have tried any of these let me know how it has worked for you.