kaib - the reason I went on Vitex was for pms - mood swings in particular. My mum bought them for me as my then partner mentioned to her that I was suffering from them. I didn't find any change in cycle at all but my mood swings got a lot better. I only realised that people take it when TTCing after I had just found out I was pregnant after trying for 9 months but had only been on them for about 6 to maybe 8 weeks and I was 5 weeks pregnant when I tested positive.