Contraceptive efficacy

Are Women Adequately Informed by Publications on Contraception? An International Perspective

“…As there is no specification of the methods belonging to fertility awareness and no reference to perfect use, this figure leads to the assumption that all the methods that usually are considered as fertility awareness have the same probability of a contraceptive failure, regardless of typical or perfect use. In addition, this statement contradicts the findings of experts in the statistics of failure rates, who attribute 0.4 to the most efficient of the fertility awareness, i.e., natural family planning methods [8].…”

Linking Changes in Contraceptive Use to Declines in Teen Pregnancy Rates

“…Women who do not use contraception have a very high rate of pregnancy: an average of 85% of sexually active women experience pregnancy over the course of a year. Thus, we find that take-up of even less effective methods among teens can result in a dramatic reduction in the teen pregnancy rate [7].…”

“…Table 1 compares simulated and real-world rates of teenage pregnancy, childbearing, and abortion. For all three outcomes, the model closely approximates the relevant real-world benchmark 7 . …”

The public health and economic consequences of unintended pregnancies in South Africa

“…The LARCs [except for depo medroxyprogesterone acetate (DMPA)] have higher continuation rates than other contraceptives such as the oral contraceptives and condoms. 38 The results described here estimate an annual cost of R3.42 billion attributed to UIPs. From the total costs, UIPs that resulted in live birth represented 82.8% (R2.83 billion) of the total costs with abortion and miscarriage accountable for 8.3% (R283 million) and 8.4% (R287 million), respectively.…”