???
There's a clinical trial advertised for a new birth control. The stipulation is that this is the only form of birth control used. So, who are these women doing this trial? If you're on birth control to prevent pregnancy why would you participate? So single women would still have casual sex (assuming they already ignore the possibility of STDs and didn't use condoms anyways) or women in relationships change their form and the men involve agree to take a risk and possibly get pregnant? I hope part of the trial includes medical coverage in any resulting pregnancies.