The month I got pregnant after trying consistently for 1 1/2 years, we had sex only 3x. The day before O, the day of, skipped a day then once more. That last day was probably not necessary.
It was getting hard trying to do things like SMEP (sperm meets egg plan), I think we ended up starting way too early, I would notice a slippery/wet sensation on day cd 8 or 9, and we started then...I think by the time I O'd, usually cd 13 or 14, DH, who is 53 BTW, would be pretty "drained".
The month of my BFP, DH had been saving it up for about 4 days, and he had a lot to deliver if you know what I mean. In the past, we wasted those big ones too early in the process.
Also, I never thought I'd say this but thank God for internet porn. This might be hard for some of you, but to make things more convenient for him I'd allow him to wake me up at night whenever he was ready. He only did this on nights when we HAD to DTD. He's a night owl, and usually masturbates before bed as it makes him sleep or whatever???, but his bedtime was totally not in sync w/mine) but I would just run into bathroom when he woke me up, squirt a little preseed in (he didn't know, don't use too much, 1" in applicator is good enough).
Our TTC sex has been the worst sex ever as I'm sure you all can relate. We haven't had sex since I found out I was pregnant either. He's deathly afraid of MC esp 1st tri, but that has just passed, so maybe he will relax a bit. I'm sure he dreads going back to square 1, TTC sex again if something happened.... Just had an ultrasound of baby as part of 1st Tri screen, and my ovaries looked pretty empty!