Answers are grounded in this paper and cite their sources.
A defect affecting 90% of the spermatozoa of an infertile man consisted of round heads and a loss of tails, probably caused by a developmental abnormality at the spermatid stage.
No takes yet. Share an insight, caveat, or question.
Aughey et al. (1978) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: