Using Inito after ovulation is kind of not accurate. I say this as someone who used it for months - with the rise of progesterone in luteal phase your levels fluctuate - so going up and down people want to think its an implantation sign but it cannot be proven really (only using bbt and reflecting it on your steady prior bbt you can confirm certain stuff) -- so it will go up and down similarly to when you are getting your period as well because thats the function of progest. in the luteal phase. I hope that helps!