Summary of Birth control methods and failure rates |Minnesota

Different types of birth control methods in Minnesota have large differences in effectiveness, but all birth control methods work the best if used correctly and every time you have sex. The vasectomy is one of the lowest failure rates among the birth control methods. The study showed the traditional vasectomy failure rate is 1-3 per 1000 cases; the failure rate would be less than 1 per 2000 in no scalpel vasectomy with the fascia clipping technique (fascia interposition).

Failure rates can be calculated statistically under a “perfect-use” condition. A “perfect-use” rate is where any rules and steps of the method are rigorously followed, and (if applicable) the method is used at every act of sexual intercourse. Therefore, actual failure rates are higher than perfect-use rates for a variety of reasons, including wrong instructions, handling mistakes, and mistakes/non-compliance from end users.

Birth control methods and failure rates (the number of pregnancies expected per 100 women)

Sterilization surgery for women: Less than 1 pregnancy

Sterilization implant for women: Less than 1 pregnancy

Sterilization surgery for men (vasectomy): Less than 1 pregnancy

Implantable rod: Less than 1 pregnancy

Intrauterine device: Less than 1 pregnancy

Shot/injection (Depo-Provera): Less than 1 pregnancy

Oral contraceptives: 5 pregnancies

Skin patch: 5 pregnancies

Vaginal ring: 5 pregnancies

Male condom 11-16 pregnancies

Diaphragm with spermicide 15 pregnancies

Sponge with spermicide 16-32 pregnancies

Cervical cap with spermicide 17-23 pregnancies

Female condom: 20 pregnancies

Natural family planning (rhythm method): 25 pregnancies

Spermicide alone: 30 pregnancies

Emergency contraception: 1 pregnancy

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