When you put someone on the birth control pill, you block a lot of the ovarian production [of testosterone].

Beyond a year, we don't know [what happens]. The question is, does the birth control pill imprint on the body a signal to continue making this protein that attaches to the testosterone? If so, these women would have less testosterone.

We have known for a long time that 30 to 40 percent of women on birth control pills have decreased libido.

There's evidence that women may switch methods of birth control or stop using the pill because they think it contributes to weight gain.

all new partners, no condoms, no birth control, no consequences at all.

We are on the right track. But the challenge is to put effective birth control measures in the northern states.