Ttc with bbt

orenee

Can someone explain bbt charting to me? I started tempting this morning which is 4 days after AF ended because it came in the mail late

I did it vaginally and it came up 98.04 today.

So just keep tempting same day every morning?

And how do I know if I’m about to ovulate with bbt and how do I know if I ovulated already?