n=1 but with my daughter we had issues and ended up resorting to IVF.
During the "issues" phase my count was tested and was considered good...problem is/was on my wife's side...all to say conception issues aren't all down to sperm counts (not that you implied that, just wanted it out there).
That’s true, but keep in mind there are issues that can happen on the women’s side where you having twice as many sperm could brute force their way past it. One example would be her immune system attacking your sperm.
During the "issues" phase my count was tested and was considered good...problem is/was on my wife's side...all to say conception issues aren't all down to sperm counts (not that you implied that, just wanted it out there).