Comment by XorNot
2 days ago
Almost completely immobile sperm can and have been used to produce healthy viable babies.
Otherwise clinically infertile men have children who are both healthy, capable and also not infertile.
Which is solid evidence that "sperm quality" is an extremely poor proxy for useful phenotypes in the resulting human being.
“can and have” sure not everything that makes sperm look feeble in a microscope actually represents an issue.
Extremely poor is a qualifier that isn’t backed up by your previous statements or actual scientific studies. Further births are very late in the process, rates of success is a critical metric here.
There’s significant research in trying to artificially create similar selection criteria because it increases the odds of a successful pregnancy and live birth. https://pmc.ncbi.nlm.nih.gov/articles/PMC7365522/
So if you still disagree, how about presenting some actual evidence.