When did I ovulate?

[Lmboschma]

So, according to FF, I ovulated on day 31, but my thinking was that it was on or around the 27th or 28th. That's when I got a positive OPK. Just trying to figure out my due date! 37855

[ksmom]

I think cd28 is likely the day of O. Your temps shot up quite a bit on that day and had what's called a rise and fall. Your temps went up then immediately went back down then slowly went up again. Your temps look triphasic to me which is probably what's throwing FF's date off. Is it possible the cd28 high temp was a fluke? Did you wake up feeling hot or sick? Move around too much before temping? If you conceived just a few days before what FF is saying, it's not a huge deal regarding due date. Due dates are just estimates and even with temping, O dates can be off +/- 2 or 3 days.

[atomic sagebrush]

^^^ agreed and please try not to worry about your due date - it's literally not a big issue at all.