I never told dh when the crucial times were. I just continued the sex we had. It was usually 2-3 times per week and maybe it increased a little more when ttc. I bought lots of lingerie and props even and just kept things exciting and having nothing to do with baby making, except of couse it was the crucial time and I knew it.
I don't think dh's function well if they feel pressured to perform and knowing it's baby making time takes the spice out of it for them. I would just cover your bases, temp and do whatever you need for timing and then go after him when it's time and make sure to when it's not the crucial times as well.
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