How effective is Depo-Provera and tubal ligation?

Answer 1

The depo shot is very effective when taken alone. If you are also taking spermicide, although nothing but abstinence is 100%, I think you are pretty close, provided that the spermicide is also taken as instructed. i.e., 15 minutes before intercourse but not longer than one hour, unless it's VCF (vaginal contraceptive film) which must be taken at least 25 minutes prior to intercourse and can last as long as 3 hours. Good for you for being so conscientious.

Answer 2

Tubal ligation has less than a 2% failure rate and is considered the most effective form of Birth Control. Pregnancies that occur after the procedure are very rare and normally occur in the first 3 months during healing or many years afterward due to the tube growing back together.

However, tubal ligation raises you risk for ectopic pregnancy. This condition can be life threatening if left unchecked so if you feel that you could be pregnant you should see a Dr as soon as possible.

The depo shot is another highly effective form of birth control. It is considered to have around a 3% failure rate.

The odds of both failing are astronomical.