Originally Posted by lilcrunchymama
SPERM CAN LIVE FOR 6 DAYS!?!?! I am really out of the loop with this... So, that means the days we do go without w/d and without condoms can still turn into viable pregnancies.
Yeah, everything I've read in the past says 6 days but this article I read yesterday said 7 days. That's why NFP/FAM isn't 100% effective. Even with a relatively hostile vaginal environment, some sperm could survive long enough for O. Biologically speaking, reproducing is the 2nd most important purpose of life so it makes sense that our bodies would work very hard at making that happen no matter what.
Whether or not the times you dtd can result in a pg depends on how close it is to when you O. If the last day you dtd unprotected is cd6 and you don't usually O before cd14, the chance of getting pg is very slim. Do you O regularly and know when that is?
If you are tracking CF then you know when you start to become potentially fertile. Whenever you have CF wetter than your BIP, you are potentially fertile. It doesn't have to be the most fertile CF. If your BIP is dry, as soon as you get sticky CF, you are considered potentially fertile.
If you don't track CF, you can figure out the earliest you could become potentially fertile by subtracting 16 from your shortest cycle length. For example, if your shortest cycle was 28 days long, you subtract 16 from 28 to figure out the earliest you would probably O, which would be cd12. Then, if you are avoiding, don't dtd unprotected after cd5 and you should be safe.
On CP, you don't need to track that to determine potential fertility or confirm O. It's a secondary fertility sign that you can use to support your temp and CF interpretations. It took me several cycles of checking every day to learn my CP. I check it sometimes because I usually get at least a week of EWCF but only 2-3 days of a very fertile CP so it can help me know when I'm closer to O.