Which birth control works 100%?

no birth control is 100% safe. penis+vagina=always risk of pregnancy

Not having sex is 100%. And you can't take Plan B AFTER HAVING SEX EVERY SINGLE TIME!!!!!!! that's ridiculous!!!

Abstinence. Only one in the world.

Abstinence. If you take the shot AND the pill AND plan B that doesn't make you 100% safe. Only 100% damaged. These aren't harmless pieces of candy you know.

Abstain from intercourse or anything which MIGHT lead to a transfer of sperm. All it takes is ONE swimmer to get pregnant from, so if there is NO WAY to get one IN to where the egg IS, then there is no possibility of pregnancy. NOTHING ELSE is 100%. The next best is 99%, which are pills and condoms. Plan B is NOT 100% sure either; like birth control pills, is 99% but ONLY if taken no more than 72 hours after the fact. Sooner is better.

no birthcontrol is 100%. the shot makes people fat, ive witnessed it, and the other stuff is not effective, use a rubber

There's no bc that's 100% safe.

the depo shot makes people gain weight..and no birth control is 100%

Dont have sex! You can not take the shot and birth control. You cannot take 2 types of birth control. No doctor will give you both! Take the pill or the shot and then also use condoms if you are that paranoid. If you are that worried about getting pregnant that you feel like you need 3 forms of BC... DONT BE HAVING SEX!