There seems to be a lot of contradictory information on whether to stop agnus castus at ovulation, as it is reported to cause uterine contractions....however i cannot find any information to support that other than in forum posting on this and other sites. I've decided to take it all month and will stop when i get a BFP, i have started taking it to try and balance my hormones as i have PCOS and for me personally i think i need to let it build in my system properly to try and balance me out, not sure it'll help me as much if i stop at ovulation. One of those thing you need to research a little i think and decide for yourself xx