Trial of Immediate Versus Delayed Initiation of Oral Contraceptive Pills After Abortion

The United States has a higher rate of unintended pregnancy than Canada or any other developed nation in Europe. OCPs are the most common method of hormonal contraception used in this country. Perfect use can lead to failure rates as low as 0.1% per year. Actual failure rates are much higher, often due to non-compliance with OCP use. Several recent studies have examined the "Quick Start", or initiation of OCPs in front of the provider while still at the clinic, regardless of time in the cycle. These studies have shown that women who swallowed the first OCP in the clinic were more likely to continue the OCP into the second month. Women who are seen in clinics for a therapeutic abortion (TAB) are often at extremely high risk for another unintended/unwanted pregnancy. If compliance in OCP use could be improved in this group of women, unintended/unwanted pregnancy rates could be reduced. One concern about the "Quick Start" technique is that women may have already ovulated or conceived when OCPs are initiated mid-cycle. In the post-abortal setting, this is not a concern. Applying the "Quick Start" technique to post-abortion patients and having women take the first of their OCPs while still in the clinic after their abortion may improve compliance and continuation of OCP use. This is a prospective, randomized, controlled trial in post-abortal women, and will last approximately 24 months. All of the study subjects will receive a single pack of combination OCPs and a one-year prescription after their TAB. The women in the immediate start arm will then take their first OCP in the clinic, observed by clinic staff, before leaving. The controls will be instructed to begin the OCPs on the first Sunday following their abortion. All subjects will receive the same medication with the only difference being the timing of initiation of the OCPs. Measurements of continuation will be determined by telephone interviews administered at two and six months after the subjects' abortion.