ovulation

[coffee]

when i used blue digital ovulation test and it shifts negative after positive
does that mean ovulation occured?!

[atomic sagebrush]

No. You can have false positives and/or false negatives on OPK strips. You can also have OPK tests that stay positive for 1+ days after ovulation, and tests that go negative before ovulation has occurred. All you can go off of is that (except in the cases of false pos or false negative) you will ovulate on average 24-36 hours after your first positive OPK. When the test goes negative really doesn't tell you much of anything.

The reason for this is that OPK strips measure the hormone that triggers ovulation, NOT ovulation itself. Your body gets a signal from this hormone, then "decides" to ovulate, but it does that on its own timeline. It may be right away after the hormone surge, or it may be a couple days later. Or it may be your body decides "nah not yet" and then ignores the surge, only to have another surge a few days or even a week or two later.

But your body has to clear the surge hormone, regardless of when or even IF ovulation has happened. If you ovulate very soon after the surge or takes a long time to clear the hormone, you can have already ovulated and still have positive tests. If your body clears the hormone very quickly, you can be getting a negative test. And if your body surges but doesn't ovulate, you'll have a test go negative once the surge is cleared, but you didn't ovulate, and will get another surge in a few days or a week or even more, and then you'll ovulate at that time.