Hiya. I was on Cerazette, and always had 30 day cycles amd ov on cd16 in past. Bust since coming off cerazette end of Feb, my cycles have not been normal by any means. I have had 26/27/28 day cycles since, and luteal phase of only 9-11 days. I've been taking agnus castus this month, in an effort to regulate cycle/lengten luteal phase, and obviously i can't say if this has worked yet, but i have had positive opks today, and cramping and ewcm since Friday pm, so i may ovulate tmorrow which is cd14, so maybe ov has moved forward and if i have a 28 day cycle, that will mean a decent luteal phase again at least.