Everywhere I read says that ovulation occurs in the 24-72 (or sometimes 12) hours after the LH surge. Is it possible for it to be days later than that? OPK says I ovulated Friday. But yesterday I thought I still had egg white CM. Last month my period didn't start until 17 days after a positive OPK. The month before that was 20 days. I'm wondering if it's because ovulation can occur more than 72 hrs after a LH surge. Anyone else find the same thing? Thought?