[Brandye]

Well, not too long ago oral birth control was considered impossible. And the currently used spermicides were revolutionar fifty years ago.

The manufacturer needs to establish safety and effectiveness. It is this second that has failed so often in trying to develop a topical preventive for STDs. This could fail with that and still mark a step forward in spermicidal development. Lemon juice was the best at one point and so was crocodile dung. Progress has been made and will continue; we just do not know which without the clinical trials.