Patient: I am actively TTC and taking my BBT constantly from the first day of my cycle.It was overall below 97 before ovulation and went up 98.4 during ovulation around day 18. Around 5 DPO my temp fall below 97 and went up 98.4 the following day. And it was constantly 98.6 till 9 DPO. Yesterday at 10 DPO I had a sudden spike of my BBT to 99 but again today it dropped to 98.6 again. My AF is due in two days. What you see in my statistic.