Originally Posted by
atomic sagebrush
I think any time the day before O or day of O is great for a boy. The reason I say the morning is to make sure you will be in that time frame and not have any risk of hitting O+12.
Sperm count is a bit higher in the morning which may help and also because you can eat all day long and keep your blood sugar elevated.
(I don't think time of day is particularly important so for anyone reading this who is now panicking, it probably doesn't matter either way - it's just that since she had the option, DTD in the morning made the most sense. Sperm count is only slightly higher in the evening and it is also more motile in the evening, and eat a good dinner and bedtime snack and you won't need to worry about blood sugar anyway.)