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Question about temps pre-O

Forum: Fertility Charting


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January 24th, 2011, 08:55 AM
Join Date: Dec 2010
Posts: 286
Can you have a slight temp rise before O day?
I know that your temp rises AFTER O due to progesterone, but today I got the highest temp I have had all month- just by .2 degress F but still the highest...I have had neg OPK's all last week and today though today's was noticably darker so I am getting close to O...just curious if anyone has any insight about pre-O temps...

I know it's common to get a temp drop the day before O and then the rise on O day...so I guess I'm wondering about the days leading up to that...
Lauren~Mama to Damion (DSS), Dorothy (DSD), Holly (DD) and Lucas (DS) and no. 5 due September 30, 2016!

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January 24th, 2011, 10:01 AM
ShawnaCAN's Avatar Platinum Supermommy
Join Date: Aug 2006
Location: Alberta, Canada
Posts: 11,397
Progesterone begins to rise just before ovulation, so it's possible for the rise to begin before O. However, it's also possible for your temps to take a few days to "react" to the increased progesterone after ovulation. So the temperature pattern does not tell us the exact day of ovulation, there's a margin of error of a few days. It gives narrow estimate, but still just an estimate.

Also, individual temps can be affected by MANY outside factors (extra blankets, alcohol, slight illness, mouth breathing, varied waking times, etc.) So don't read too much into any one rise or one dip. It's the overall pattern that matters.
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January 24th, 2011, 01:54 PM
Join Date: Dec 2010
Posts: 286
Thank you so much for this info!
Lauren~Mama to Damion (DSS), Dorothy (DSD), Holly (DD) and Lucas (DS) and no. 5 due September 30, 2016!

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