When I tell people that I'm trying to develop a contraceptive pill for men,
the response usually varies along gender lines.
Women say something like, "Fantastic. It's about time. When?"
Men have one of two responses.
They either love the idea, or they look at me a little warily and wonder what exactly I have in store for their testicles.
So why does the world need a male pill?
Well, what if I told you that of the six million pregnancies annually in the United States,
three million of them are unintended? That's half. That's a really surprising number.
And those three million unintended pregnancies account for the vast majority of the more than one million abortions annually performed in the United States.
Happily, the rate of unintended pregnancy has fallen in the last few years by about 10 percent.
This is because more women are using effective, long-acting, reversible forms of contraception.
But we still have a long way to go.