some vitex+SP stats for you
correct as of today, from the spreadsheet. Some food for thought!
vitex overall (everyone who tried it) - 55 sways: 50.91% success
saw palmetto overall (everyone who tried it) - 40 sways: 55.00% success
NO vitex (those who didn't take it at all) - 101 sways: 64.36% success
NO saw palmetto (those who didn't take it at all) - 116 sways: 62.21% success
vitex but not SP - 27 sways: 55.56% success
vitex and SP - 28 sways: 50.0% success
SP but not vitex- 12 sways: 66.67% success
neither vitex nor SP - 89 sways: 64.04%
although of course this could be coincidence that SP alone seems much better given the lower number of sways trying that