Hello,
Not sure about the prolactin levels but can give you my experience.
I had a short luteal phase and cycle was not particularly irregular, but ranged from 26-32 days.
After taking agnus castus for a month or two (I can't remember the dosage but it was a bottle from holland and Barrett, 2 casuals twice a day I think... The instructions were on the bottle), I started to ovulate earlier in my cycle, reducing my LP and my cycle length evened out to 28/29 days. I have not taken them for probably 18 months now but my cycles are still regular with a normal LP.
