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My O date according to FF was originally CD 16. This made sense to me because of my CM and CP at the time. On what would have been 5 DPO it raised my coverline and moved my O date to CD 18. On CD 18 my CM was drying up and my CP was back to low and closed. My OPKs on CD 18 were barely even positive.
When do you ladies think I actually O'd? CD 18 just doesn't seem right to me at all because of what was going on other than my temp. You all have more experience than I do though. Thank you in advance.
CD 18 makes more sense to me since you had a couple of pos. opk's after the 16th even if they were barely positive (the lines were at least the same color, right?) I would think the O date would be the day before or of cm dry up. The thermal shift is more definate after CD 18 as well. I'm no expert though and I'm still learning when it comes to charting
FF was doing wierd things with my O date this month so I finally overrode it to agree with my TCOYF chart.
The new date looks correct to me. The last day that your CM is slippery is considered your Peak day. Ovulation usually occurs on Peak day, or up to two days afterwards while the mucus is drying up. Ovulation occurs 12-36 hours after your LAST positive OPK. Temperatures rise after ovulation, sometimes even a few days after ovulation.
To confirm ovulation, you need 3 temperatures which are higher than the previous 6 temperatures. That certainly didn't happen until CD20, 21, 22.
TCOYF: Taking Charge of Your Fertility - a book that explains fertility by Toni Weschler. Many people learn to chart by reading that. It has it's own software called Ovusoft which is really comprehensive.
The ONLY time I have ever had a false O date on TCOYF was when we all thought I had O'd. my body tricked us until I was almost 9 "dpo", and blood tests revealed that I had not O'd. Even if you don't use the software, the book is awesome for learning more about your cycle