How can I ensure my gf does not get pregnant?

Don’t have sex.

@MrItty Ha, haha, hahaha! Oh, you’re serious. Ha. If only…

get a vasectomy

Being on birth control and using condoms is the perfect combination. Make sure you’re aware of the proper usage of condoms. A couple things that link doesn’t mention: A little (water-based) lube on the inside of the condom and a lot of lube on the outside can make sex both more pleasurable and safer. If you start to put a condom on the wrong way, don’t flip it around and try again. Get a new condom. Make sure you know about Plan B or whether she can use her birth control as a morning-after pill for worst-case scenarios. But it sounds like you’ll be pretty safe.

Birth control is 99% effective, condoms are about 90% effective. The only reasons these numbers are not 100% is because of human error. Use both of these things and use them correctly, you shouldn’t have a problem.

@le_inferno Actually, because most of the studies are actually done by the birth control companies, they write off cases of incorrect use. Those statistics only include correct use of birth control and condoms—the statistics including incorrect use are much closer to 70% or 80%, I believe. I’ll see if I can find those specific numbers.

Update: Okay, here we go. The numbers are higher than I thought, but still useful to know.

Condoms, ideally (that is, used properly), are 97% effective. Typically they are 84% effective.

Oral birth control, ideally, is 99–99.9%. Typically it is 92–95% effective. (The range is for different kinds of pills).

These numbers are all pretty high, but repetitive use drives the likelihood of a mishap up exponentially, which is why it’s so important to use them properly so you can safely have lots of sex!

No sex should do it. I got pregnant twice while on birth control pills.

Depending on how one defines it, abstinence is not empirically 100% effective either.

Perhaps keep the morning after pill in mind (How/where to get some, or if you can keep some in your bathroom). Just in case something crazy happens.

I am on the birth control shot (and take a multivitamin to avoid long term effects) and my boyfriend wears condoms. We had them break a couple of times in the beginning, I assume due to incorrect use and bad condoms (we have since converted to Trojan, as they seem to be stronger). Perfectly amazing sex too.

I like the shot because it works through 3 methods of action, whereas the patch and pill only work through 2. The shot alters your egg release, keeps your uterine lining thin (so that if sperm should get through, a little sperm-egg can’t implant in the uterus), and promotes secretion of mucus at the cervix to create a “plug”, slowing down/preventing sperm from getting into the uterus. Some people rely on just the shot because of it’s 3 in 1 action, but I think condoms provide a much safer setup and some piece of mind.

When all else fails, use your head.

I hear they got male birth control now….. Lolz but hey whatever works

Ahem, Stick to oral and anal sex and you will never get her pregnant.

@Hypocrisy_Central In theory it sounds great,—in practice, it turns out to be not always true. Anytime there’s semen and it’s near an exposed vagina, there’s a risk of pregnancy. The anus is not as far from the vagina as one might think…