Depo-Provera - Effectiveness

Effectiveness

The life-table first-year failure rates for 8,183 women using Depo-Provera in seven prospective clinical trials were: 0%, 0%, 0.1%, 0.2%, 0.2%, 0.3%, and 0.7%, with a weighted average of 0.3%.

The Pearl Index first-year failure rates for 2,042 women using depo-subQ 104 in three prospective clinical trials were: 0%, 0%, and 0%, with a weighted average of 0%.

The first-year failure rate for 209 women using Depo-Provera in one retrospective survey was: 2.6%.

• the 1995 National Survey of Family Growth (NSFG) — a retrospective survey based on a woman's recall, during a 90-minute interview, of her month-by-month contraceptive use during the preceding 4 to 5 years