Ok, so we've been ttc for 4 cycles and I just decided to start charting. I had the mirena and I'm really not sure if I'm even ovulating. Anyway, I got a bbt thermometer, then decided I'd check cm too. That's the part I'm not sure of. I've never really produced enough to check it externally, so internal is the only way to really know. But how does sex tie into this? I checked this morning, but we dtd last night, so I couldn't tell what the cm was like because the uh, other stuff was still in there. :/ Glad I'm not asking this question in person. My cheeks would be on fire! So what's your experience? Is it gone by the end of the day? Should I just check later?