FF and CTP give different O-days??

[DTor25]

Can someone experienced with BBT charting look at my chart? Countdown to pregnancy has my possible ovulation on cycle day 20, while FF has it on cycle day 18.

https://www.countdowntopregnancy.com/homepage/?u=10418


https://www.fertilityfriend.com/home/5a91aa


Which day, based on my charts, do you think is O day?

 

[DTor25]

Ok, so after entering my temp this morning, FF reassessed my info and moved my ovulation day to Day 20, so they both match up now!

 

[lilmisscaviar]

Well at least you got that straightened out LOL. I use count down to pregnancy too... it's a really good website for charting. Good luck btw! Hope you get a sticky bean!