Why do you take the ovulation predictor test the day after period?

posted 1 week ago in TTC
Post # 2
Member
2408 posts
Buzzing bee
  • Wedding: April 2014

calliekalico2 :  It depends on how long your cycle is and your period lasts. Some women have a 5-6 day period and some have much shorter, like 2-3 days. It isn’t uncommon to get a few days of positive OPK prior to your actual ovulation (and OPK does not confirm ovulation, but ‘predicts’ it to happen within 12-48 hours after a positive test). If you knowingly have a 40+ day cycle, then testing immediately after your period is pointless because you won’t ovulate until around 14 days before your next expected AF.

For example, I would have a 2-3 day period, but ovulate around day 11. It wasn’t uncommon for me to get a positive OPK by CD9. Someone else might also ovulate around day 11 – but have a period that lasts 5-6 days. If they weren’t testing the day after their period ends, then they might miss the surge.

I think a general rule of thumb is that starting OPK around CD 7 or 8 would give accurate results, based on a 28 day cycle.

Post # 3
Member
828 posts
Busy bee
  • Wedding: August 2015

As your cycles progress and you notice other signs of ovulation, you will have a better idea of when you should start with the OPKs. The first time I used them I started on day 10 and didn’t get a positive until CD21, but it really helped me zero in on those other signs. This cycle I started testing on CD12 and got the positive much earlier than expected on CD16, so I was glad to have starred when I did. It’s a process! 

Leave a comment


Get our weekly roundup of the best of Weddingbee.
I agree to receive emails from the site. I can withdraw my consent at any time by unsubscribing.

Find Amazing Vendors