I remember that a newish study stated the rates of conception are 33% if every other day, and 37% if every day in the fertile window.
The difference isn't big, and it depends on the genetic material and luck, too - will it stick.
Personally I agree with Mindutopia, psychochick and fairy cat:
- go with what suits your OH's body, and your body
- don't do so much it becomes stressful
- focus on timing and relaxing, letting your body know it's a good time for conceiving
My guy got really stressed on the cycles we tried every day, as he really wants kids. I noticed it's better not to tell him I'm O, instead make him feel I just suddenly can't resist him
(true tho!) .Even tell him I'm past O.