I too have heard great things about Vitex. I have only been TTC for the past 2 months, and took Vitex tablets for the first 4 weeks from the start of my 1st period whilst TTC... my period is usually 4-5 days long. At the start of my 2nd cycle, my period was just 1.5 days! I instantly got a little scared/nervous and stopped taking it. If I don't get a positive test result this time, then I will check to see how long my period is this time around... if it goes back to 4-5 days long then I can be pretty sure the Vitex has something to do with it.