Worth noting two things: First, I'd hardly call infertile a man who had several children of whom a decent percentage lived to see early to later adulthood (goo

Worth noting two things: First, I'd hardly call infertile a man who had several children of whom a decent percentage lived to see early to later adulthood (good by late medieval standards, even among the wealthiest). Secondly: Even today millions of people all over the world live their lives with undiagnosed or poorly diagnosed and incorrectly treated venereal diseases that can cause all sorts of long-term fertility problems. This despite such things being mostly curable and reasonably easy to diagnose even in fairly poor countries with basic medicine. Now imagine those numbers and their related complications in a time when medical knowledge around anything except obvious injuries and broken bones consisted of blaming bad humors and maybe witchcraft for random ills... Yeah... Either Henry or any of his wives could have been harbouring the long-term effects of any one of a dozen common sexually transmitted or other types of infections without having a clue about how these things were screwing with their capacity to screw their way into healthy children.