so we sent abc's maria schiavocampo to find out why. >> reporter: it's known as viagra for women. >> the little pink pill. >> reporter: a tiny tablet that could have hey huge impact in the bedroom. >> i think this is an evolution in the female sexual revolution. >> reporter: but you won't be able to get the pink pill just yet. the drug is locked in a heated battle for fda approval, raising controversial questions about why there are so many sexual enhancement drugs out there for men. >> why would you let's wreck ti -- let erectile dysfunction get in your way? >> a great big zero for the most common form of female sexual dysfunction. >> we are having spaghetti for dinner. >> i realized something was wrong. i didn't feel like myself. >> reporter: amanda parish says she used to have a smoldering sex life with her husband. over time, things cooled off big time. she says the problem wasn't with him, but with her. >> i felt like even though we were close and having a great relationship there was something just not there. >> reporter: amanda parish took the pink pill as part of the clinical

abc's maria schiavocampo tonight. >> reporter: when it comes to enhancing libido, there are plenty ofptions for men as we've all seen in those iconic viagra commercials. for women, not so much. there are currently no fda approved drugs for female sexual dysfunction. cindy whitehead is trying to change that. she's the head of sprout pharmaceuticals. a company with just one single drug. >> it's the little pink pill? >> it's the little pink pill. >> reporter: known as viagra for women. it's real name is a less than sexy flibanserin and if approved would become the first drug of its kind on the market, specifically for treating hypoactive sexual desire disorder or hsdd affecting an estimated one in ten women who say they have no desires whatsoever. >> if you are married and you have no sexual desire but if channing tatum walks through the door everything changes do you have that condition? >> you do not. that's important. >> reporter: married mom amanda parish says she has hsdd. after using flibanserin for a few weeks as part of a clinical trial, she says she noticed a definite difference