Stud Fam Plann. 2017 Sep;48(3):269-278. doi: 10.1111/sifp.12023. Epub 2017 Apr 11.
High contraceptive discontinuation results in millions of women having an unmet need for contraception. However, its contribution to unintended fertility is not known. Reproductive calendar data in Demographic and Health Surveys in 36 countries are used to estimate the percent of unintended recent births attributable to contraceptive discontinuation. Contraceptive discontinuation accounted for about one-third of unintended recent births in all countries together. Method failure and contraception discontinued for other reasons accounted for most of this contribution. The contribution of contraceptive discontinuation to unintended births increases with the use of modern methods but decreases as method composition at a given level of contraceptive prevalence shifts toward methods with higher effectiveness and longer continuation. High contraceptive discontinuation in the past without changes in fertility intentions has resulted in millions of unintended births. This contribution is likely to increase with the anticipated increase in the use of modern methods. Enabling current users to reduce method failure and encouraging them to switch to another method after discontinuing the use of the original method will be an effective strategy to reduce contraceptive discontinuation and its contribution to unintended births.
高的避孕失败率导致数以百万计的女性对避孕有未满足的需求。然而，其对意外怀孕的贡献尚不清楚。本研究使用来自 36 个国家的人口与健康调查中的生育日历数据来估计因避孕失败而导致的近期非意愿妊娠的比例。在所有国家中，避孕失败约占所有近期非意愿妊娠的三分之一。方法失败和因其他原因停止使用避孕措施是导致这一比例升高的主要原因。避孕失败对意外怀孕的影响随着现代方法的使用而增加，但随着特定避孕普及率下的方法组合向效果更高、持续时间更长的方法转移，其影响会降低。过去高的避孕失败率而没有改变生育意愿已经导致了数以百万计的意外怀孕。随着现代方法使用的预期增加，这种影响可能会增加。使现有使用者减少方法失败，并在停止使用原始方法后鼓励他们改用另一种方法，将是减少避孕失败及其对意外怀孕的贡献的有效策略。
