@miriam98 - I’ve heard that it’s actually possible to increase male sperm motility, the speed and force with which the sperm reaches the egg. Supposedly, tomato juice increases motility.
That’s no joke; there was a scientific study that said that men who drank a lot of tomato juice would increase the motility of their sperm. I don’t know what substances in tomato juice accomplishes is, but it’s one more reason to load up on your vegetables.
I’d bet your doctor would recommend medication however.