No it doesnt. You should O with 48 hours on the first positive. 24-36hours after being most common.
No harm in bding tonight to se safe though. Sperm can live for upto 72hours so you should be safe.
Well from my experience and the experience of a friend who was temping, the LH leaves your body and then you ovulate after that. We both took OPKs several times a day to see how long our surge was.
I have also read on several reputable sites, that if you have a long LH surge, it means your body is struggling to release the egg, and that your body can gear up again producing more LH to try and try to ovulate. It is said that if this happens more often than not, then it is indicative of a problem and you should contact your doctor. So considering all that I think its safe to say that if you still have LH in your urine you have not ovulated. That is why they say women should test more than once a day. Because some women have short surges, and if they test only one time a day, they could have had the surge and it went away before they tested again.
When they say a women will ovulate within 12 to 36 hours after the positive OPK, they are assuming that these women arent testing more than once a day. So if you get the postive and never test again you dont know how long your surge. My surge was 36 hours and I ovulated the day after I received the first negative. Same with my friend. Therefore our surge was about 36 hours, then the egg. But some women have a longer surge, 3 or 4 days and they wouldnt know if they only tested once. I hope this makes sense. LOL
Sorry I disagree. I agree that a long surge over 2 days can indicate difficulty ovulating. This can happen with a short surge too, I'm an example of this this cycle, see my chart. If O fails it is more likely you'll try again in a few days rather than straight away.
All info including fertility sites, research and OPK markers (who stand to make more money) agree that you should O with 48 hours of your surge (first true positive) and therefore stop after the first positive (peeonastick agrees). It is the surge in LH which triggers the release of the egg, not a fall. An extended LH surge (3 or more days) could mean you are struggling to O but often it is just that levels are slow to decrease and still registering positive.
Check out charts on FF which use OPKs, the vast majority O within the 2 days following the first positive even with 3 positive OPK.
I agree testing twice a day near O is best. I'd miss my surge otherwise. Use temping to confirm O incase it fails. Test more if you want but I just bd until I see a temp rise. If you don't temp bd until CM/CP changes. If your O is unpredictable check through LP and bd whenever you have fertile CM/CP just incase you haven't O'd.
Sorry if I sound argumentative but I just disagree. Although I didn't explain everything that's possible in my post.