Originally Posted by
Ladynic
Cc5025 if it helps, Shettles has been pretty much debunked. Also, it's impossible to know exactly what day you are ovulating based on OPK (can be determined within reasonable certainty AFTER if temping but not before). Even if you have a specific pattern you usually follow, every cycle is different (as I'm learning myself). Even if you could pinpoint the exact day of O, my understanding is that your chances of actually conceiving from bd the day of O are pretty slim. The sperm need time to capacitate and the egg only lives for a short amount of time after it's released if not fertilized.