Much hope had been pinned on a substance called nonoxynol-9 (the spermicide used to coat condoms that are intended to prevent pregnancy rather than disease).
But I had suspected that the contraceptive and lubricant industry had tested the concentrations of nonoxynol-9 they used to be selective cytotoxins to spermatocytes relative to vaginal epithelium.
In my lab days, I always wondered about the wisdom of using nonoxynol-9 as a spermatocide because we used to use a related compound, octoxynol-9 (better known to labbies as Triton X-100), to break open human epithelial cancer cells to examine the proteins inside them.