BD 36 hours after positive OPK – is that too late?

posted 6 months ago in TTC
  • poll: Is 36 hours after positive OPK too late to BD?
    Too late, unlikely to get pregnant : (3 votes)
    14 %
    Great timing to get pregnant! : (3 votes)
    14 %
    Somewhere in the middle - not ideal timing, but could still happen : (16 votes)
    73 %
  • Post # 2
    10 posts
    • Wedding: August 2018

    I was under the impression that ovulation generally happens 24-48 hours after the LH surge, so there’s definitely a chance you caught the egg in time. Unless you’re temping, there’s no way to know exactly if/when you ovulated.

    Don’t count yourself out just yet! Good luck 🙂

    Post # 3
    2553 posts
    Sugar bee

    OPK’s tell us we are LIKELY to ovulate within 12-72 hours. That’s a window of half a day to 3 days. You can also get a peak OPK and never actually ovulate. 

    So if you ovulated within 12 hours of your positive OPK (the egg disintegrates within 8 hours), then you were too late.

    However, if you ovulate 72 hours after your positive OPK, you were in time. 

    You really can’t know if you were on time or not without knowing when you actually ovulated. And unless you’ve been temping and charting, you can’t know that.

    I temp and chart and I know I ovulate within 24 hours of my first peak OPK, so BD at 36 hours would miss the mark for me.

    Post # 4
    983 posts
    Busy bee
    • Wedding: August 2016

    As the pp stated, ovulation usually occurs within 48 hours of the positive OPK, so while its possible you caught it in time, I wouldn’t call it ideal timing. The sperm also need a few hours to travel to the egg. I use OPKs along with temping which shows me that I ovulate the day after a + OPK so that’d be too late for me. If you’re looking for the best timing to conceive, many swear by the SMEP method: sex EOD until you get a positive OPK, then for three days in a row (to catch O-1, O, and O+1). Good luck bee! 

    Post # 6
    9764 posts
    Buzzing Beekeeper
    • Wedding: September 2013

    duchessgummybunns :  agreed.

    ttw16 :  I usually ovulated about 12 hours after a positive OPK (based on my ovulation cramps) and then O itself confirmed by temping.  Sometimes closer to 24hours though.  So 36 hours would have been too late for me.

    I don’t think it’s ideal timing but there is probably a small chance still (maybe less than 10%??).  Once you use OPKs awhile, you’re better off pre-emptively having sex. Sperm can live 5 days waiting for the egg in the proper conditions.  The egg does not last anywhere near as long as that.

    Post # 7
    9236 posts
    Buzzing Beekeeper
    • Wedding: August 2012

    Definitely not ideal timing IMO but stranger things have happened I’m sure.

    Post # 8
    209 posts
    Helper bee

    My understanding is that chances are better if you BD in in advance of ovulation, because sperm can live for a few days in there whereas the egg is viable for only a short time once you ovulate. If you can, it’s ideal to BD the day of a positive test as well as the next couple of days afterwards. But it’s still possible!

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