Is it common for fertility friend to be wrong on ovulation day?

Question

I just started charting with fertility friend and it says I ovulated on the 20th, but according to my cm and just the way I "felt" I'm sure I ovulated on the 22nd. I got a positive opk on the 20th and my temps didn't start to rise until the 23rd. I'm just curious if it's possible the chart is wrong, also how does my chart look so far? I'm very new to charting and am not sure what to be looking for on a chart.

http://www.fertilityfriend.com/home/20c828

Answer 1

Fertility friend will change the date if they see more information leading to another day. Give it a few days and see what happens!

Answer 2

It's not "common".. But it is possible. I took 4 pregnancy tests that all read NEGATIVE when I was in fact... pregnant.. The same way.. Fertility readers can prove to be incorrect.

Answer 3

I would be willing to bet, with your cm information, your opk information, and your temps, that after a few more day's worth of temps are entered, fertility friend will change that date.  That has happened several times to me.

Good luck to you!