The commonest objection to birth control is that it is against nature.

I do not pretend that birth control is the only way in which population can be kept from increasing. There are others, which, one must suppose, opponents of birth control would prefer.

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.

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.