Ok...very good to know..our initial new plan was cds 13 (yesterday) 15 and 17 18 19 (predicted OD)...but then I was feeling like we just should keep going without skipping because my OPKs are getting darker...it just feels strange to skip...but now, after reading the article and reading what you wrote, I thing we will just try every other day...13 15 17 19....I have a feeling the LH surge will come tomorrow (cd 15)...
Honestly, I think that the only timing that counts is getting the last day of ewcm prior to ov. If you've ever read "Taking Charge Of Your Fertility" by Toni Weschler, she specifically says that this day is the most important. Yes, sperm can live in the ewcm for days, but getting the last day gives you the best chances, and I'm about 90% sure that this is when I conceived all of my kids.
(I have to add that I really wish I didn't know all of this crap! What ever happened to just having crazy wild sex and missing a period? Sheesh!)
I've done every 24, 36, and 48 hours for 11 cycles and nothing.
This time (of course I have a plan that DH doesn't know about, lol) I'm honestly going to abstain until the second day of my ewcm. I usually have watery cm for 2-3 days and then 2 days of ewcm. It sounds crazy, but I'm going for a one time shot. I'm working toward that last day.
I hope your plan works out for you Indigo!