Every single drug during the phase II testing since the 1990's must be tested in both genders and must have a gender analysis (unless it is for some body part only one gender has).Before th 1990's they usually only used men for all testing except for the things they didn't have the parts for.Drugs must be safe AND effective. Just because it doesn't hurt someone doesn't mean it gets approved. If a placebo is as effective or more effective the drug will not be approved.In the Phase II testing with both men and women it was statistically better than placebo in women but was not better than placebo for me.Since then some testing shows it may work for some men, but it would probably need a lot more than the few small studies to prove effectiveness to the point it would be approved.Drug testing phasesI. Small numbers of health people to see if it is even safe to give to anyone. Usually dozens of people. Make sure dose range is reasonably safe for humans.II. Test in hundreds of people with the disease to get initial idea if it can work and dose range it may work at.III. Test in a few thousand people with the disease to find the common side effects and check for efficacy. Can only test in subgroups where phase II show potential effectiveness.IV. Post release studies for any potential issues that come up.