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Need Clarification on CM and Temp In Regards to Ovulation

Forum: Natural Family Planning and FAM


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May 30th, 2009, 11:58 AM
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20d41b Ovulation Charts

So. Here's my chart. CM dried up two days before temp rise. Soooo doesn't that mean that ovulation would have occured the FIRST day of cm dry up? Or is ovulation possible the day AFTER that?

I'm so confused! I would have *thought* I o'd on CD 27, the day before the temp rise. My cervix was still high on that day, and my temp went up the next morning. But the cm was dry for two days by then.

I am confused. And my software doesn't help. lol If I use "cm only" it gives me O day as CD 26, the first dry day. If I use "temp AND cm" same thing. If I use "temp only" it gives me cd27.

FF gives me cd 27, I am assuming because of the temp rise?

Opinions? What day would you think?

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May 30th, 2009, 02:20 PM
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Usually, you know if ovulation occurs if you have three days of dry up. Temperature only really is an indication that you HAVE ovulated.
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May 30th, 2009, 03:03 PM
ShawnaCAN's Avatar Platinum Supermommy
Join Date: Aug 2006
Location: Alberta, Canada
Posts: 11,397
When CM and temps don't quite agree, CM always trumps temps. The CM Peak day (the last day of slippery mucus) is the day most closely associated with ovulation. Ovulation usually occurs on Peak day, the first day of dry up, or on the second day of dry up (then the egg can live up to 24 hours). During the 3 days of drying up, the plug in the cervix forms - but there are still channels through which the sperm can enter the uterus. That's why with mucus-only methods, the 3 days of drying up are still considered fertile. On the 4th day after the mucus Peak, the egg is dead, the plug in the cervix is fully formed, and infertility begins.

Charting temps and mucus just gives an estimate of when ovulation occurred, the "window"during which it likely happened. Don't get hung up on the exact day. Judging by your chart, I'd loosely assign your mucus Peak to CD25 - meaning ovulation could have occurred that day, CD26, or CD27 (and lived until CD28.) I say "loosely" because FF doesn't give include enough CM options to make a more accurate evaluation of the mucus pattern.
Your temps seem to confirm that possibility. If it was CD25, you're covered by the BDing on CD22 because there was mucus that day. Sperm can live 3-5 days in mucus. If it was CD 26 or 27, you're also covered because of the BDing on those days!

So after all that, if you get one more high temp - you can conclude that ovulation occurred on either CD25, 26, or 27.
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