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Which day was ovulation?

Laura • Tue, Nov 10

I have been tracking my bbt for about 7 months now and I have never had this happen. I had a temp rise on cd 15 and thought I ovulated on cd 14. Yesterday FF said cd 14 was ovulation day. Buttt this morning when I took my temp it change ovulation day to cd 16. I hope I am not out this month because we didn’t BD that day :(