failure rate (contraception / efficacy of method)
Last reviewed 01/2018
Technique:
| Method | Failure Rate defined as (pregnancies / 100 woman-years (%) ) |
| Norplant; failure rate 0.2-1.1 | 0.2-1.1 |
| Implanon (3) | fewer than 0.1 in 100 over 3 years (3) |
| Mirena coil | 0.09 |
| combined pill | 0.2-0.3 |
| mini-pill | 0.3-5 |
| condom | 2-15 |
| diaphragm and spermicide | 5 |
| IUCD (see below) | 0.3-4 |
| coitus interruptus | 30 |
| rhythm method | 30 - 40 |
| Depo Provera | < 0.5 |
| none | 60-70 |
Interpretation - 5% failure rate means that if 100 women used this form of contraception, 5 would be pregnant within one year.
Reference:
- Drug and Therapeutics Bulletin 1996; 34 (12): 93-5.
- BNF 7.3
- NICE (October 2005). Long-acting reversible contraception
contraception during perimenopause
failure rate ( contraception , perimenopause )
UKMEC (UK Medical Eligibility for Contraceptive Use) criteria