I will give my own experience regarding Vitex. I do not/have not had PCOS...but a short cycle with 14 days of bleeding or spotting. NOt heavy bleeding...but spotting and bleeding 14 out of a 21 day cycle.
I had a very short leutal phase about 7 days.
I have done a lot of emotional work in regards to sexual abuse, grief over my children;s medical births. I also am taking Vitex.
I am happy to say, my bleeding/spotting is now a few days a month and my cycle has lengthened to about 25-28 days.
A HUGE improvement.
I did not have PMS mood issues...but I did have libido issues.
My libido is great now