I have very irregular cycles that go anywhere from 31-36 days. My OB said that it means that I ovulate later in the month because my cycle is so long and I have been trying to time it off Glow with absolutely no luck. So I'm trying Glow and adding the ovulation kit. I bought the 20 pack so I don't miss it I am just not sure when I should start. My last cycle was on 20 Dec 16. Any ideas???? Thanks in advance and I hope everyone had a good holiday!