Beth Israel Residency in Urban Family Practice, New York, NY, USA.
Am Fam Physician. 2011 Mar 1;83(5):567-70.
Unintended pregnancy can occur when women stop one birth control method before starting another. To prevent gaps in contraception, physicians should ask women regularly about adverse effects, cost, difficulty remembering the next dose, and other issues that affect adherence. Women who want to change contraceptive methods need accurate advice about how to do so. Some contraception transitions require an overlap between the old method and the new method. To switch safely from one contraceptive to another without overlap, women may go directly from the old method to the new method, abstaining from sexual intercourse or using a barrier method, such as condoms or spermicide, for the first seven days.
当女性在开始使用另一种避孕方法之前停止使用一种避孕方法时，可能会发生意外怀孕。为了防止避孕出现空白，医生应该定期询问女性关于不良反应、费用、难以记住下一次剂量以及其他影响依从性的问题。想要改变避孕方法的女性需要有关如何做到这一点的准确建议。一些避孕方法的转换需要新旧方法之间的重叠。为了在不重叠的情况下安全地从一种避孕方法转换到另一种方法，女性可以直接从旧方法过渡到新方法，在前七天避免性交或使用屏障方法，如避孕套或杀精剂。
