OPK's: When and How Often?

posted 3 years ago in TTC
Post # 3
Member
2197 posts
Buzzing bee
  • Wedding: March 2013

It depends on the length of your cycle. But most will start around CD 10. Test 2x a day so you don’t miss your LH surge. Usually later morning and evening time. Not first morning urine like a HPT. Remember that you want the test long the same or darker than the control line. You always have a little LH in your system, so don’t be surprised if you see a faint line. Once you get a positive, you should ovulate 24-48 hours later so get to BDing. 🙂 hope this helps. I thought I O’d close to CD 14. But opks showed me I am closer to CD17-19. 

 

Post # 4
Member
6502 posts
Bee Keeper
  • Wedding: September 2011 - Baby boy 12/2015

Good question, see below for what technique I use.

Post # 5
Member
6502 posts
Bee Keeper
  • Wedding: September 2011 - Baby boy 12/2015

@Treejewel19:  Yes, you can end up using tons of OPKs. I am late O-er around CD19-22. What I started doing to save some sticks is wait until EWCM starts to show up, either that or I start testing around CD14 once a day between 12-8 pm. I noticed my OPKs get progressively darker the closer I get to my actual O day. Once I see them getting close to positive, I test twice a day once around noon and one later in the evening.  I usually get two days of positive OPKs, so I am not too worried about missing the surge. Then I confirm with elevated basal body temps. Good luck!

Post # 6
Member
401 posts
Helper bee
  • Wedding: September 2012

@Treejewel19:  I start using them around CD 10, and test in the afternoon (around 1:30pm, or 4:30pm, depending on my work schedule!) every day, once a day. Last time I got a positive 48hours before ovulation! Hope that helps.

Post # 7
Member
303 posts
Helper bee
  • Wedding: October 2010

@Treejewel19:  I was a true first-timer with OPKs this month too! I typically ovulate closer to CD18-CD20 but last month I started testing at CD14 just to see and got a positive! This month I started checking on CD12 and got a positive on CD15 and CD16. I’d say start 5 days prior to your typical O day, but some folks start immediately after their period is over just to be as careful as possible so as not to miss the surge.

It helped me to read up on the LH surge and when it happens — typically overnight or  early morning — and it may not be detectable until mid day or early afternoon.  I found this article really helpful: http://coloradofertility.com/patient-resources/the-lh-surge/

I’ve been stuck in a Catch-22 between drinking lots of water for good CM, and  then my urine being really diluted and tests hard to read! I just saw on  FertilityFriend.com that they recommend limiting fluids and doing a 3 to 4 hour  hold of your urine for best results.  I got my two positives later at night after working out (random, right?) and having a 4-6 hour hold.

Best of luck!

Post # 8
Member
298 posts
Helper bee
  • Wedding: August 2013

I started testing at CD8 my first time using OPK’s and I’m glad I did because I apparently O pretty early: CD11 or CD12 (I have 2 days of + OPK’s with the first + on CD10 or CD11). I have a 27 day cycle. If you have a 28 day or less cycle I’d suggest starting a little earlier than CD10, maybe CD8, just in case. It’d be worth it if you do O early. Had I missed it I would have thought I was just doing it wrong or the OPK’s didn’t work. If your cycle is longer then I think starting to test on CD10 would be fine. I typically test once a day (second morning urine, 10 a.m.-ish) from CD6  then twice a day (10 a.m.-ish and 8 a.m.-ish) after I get fertile mucus. Once you know when you O you can restrict it more to save money on the tests, but I I’d personally rather spend a little more the first month and know rather than chance missing it.

 

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