I didn't ovulate on the CD 17. I took letrozole this cycle so maybe my temps were just getting back to normal after CD 7 (my last day of letrozole), idk if letrozole affects bbt. But I had my progesterone checked on CD 19 and it came back .43 (negative for ovulation) then I got a peak on strip tests and a solid smiley on CBAD ovulation test on CD 20. Also, based off past bbt (including one cycle I got pregnant, which unfortunately was ectopic) my bbt rises relatively slow. Usually not really rising much until 3dpo.
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Premom - shows ovulation on CD17 Fertility friend - shows ovulation on CD17. They are both going by the temp rise. Neither chart shows ovulation to have happened on CD21. Fertility friend *could* show it on CD22 as that’s when you have the second temp rise. Your temp needs to stay elevated now (3 temps higher than the previous 6) to confirm it