BBT NEWBIE - more questions 😅

Katy

So I know sustaining temps for at least 3 days that have been higher than the previous 6 indicates ovulation. My question is, how much does the spike up have to be? And is it just from one day to the next, boom spike up? Or is the rise gradual over a couple days?

Sorry if these are stupid questions, I’m new to tracking BBT and am trying to learn. Any other tips, tricks, or advice welcome!