when birth control stats are made is it basically where 1000 participants take part in a study and fuck X times a week for a year or six months and then they take the percentage of those who get pregnant and turn it into a stat?

warning stupid question below*

when they are having sex do the men ejaculate inside?

one is led to beleive so.
not a stupid question really, but i think it's implied.

How would any of the girls get pregnant (like you said) if the men didn't ejaculate inside? And how would they test if the birth control is working or not if the men didn't ejaculate inside the woman??

What were you thinking?

no, his question is valid you just interpreted it wrong.

The real question is in these statistics are the girls always being intentionally cummed in or we're they using condoms/pulling out and the pregnancies are pullout/condom failures or precum?

no, his question is valid you just interpreted it wrong.

The real question is in these statistics are the girls always being intentionally cummed in or we're they using condoms/pulling out and the pregnancies are pullout/condom failures or precum?

I'm going to guess that the guys cum in them. Otherwise it seems highly unlikely they'd get pregnant. Most often, though, it's because the women don't take the pill at the same time every day.