Elsevier

Contraception

Volume 78, Issue 2, August 2008, Pages 143-148
Contraception

Original research article
Impact of immediate postabortal insertion of intrauterine contraception on repeat abortion

https://doi.org/10.1016/j.contraception.2008.03.003Get rights and content

Abstract

Background

Of the 1.3 million abortions performed annually in the United States, approximately half are repeat procedures. Immediate postabortal intrauterine device (IUD) insertion is a safe, effective, practical and underutilized intervention that we hypothesize will significantly decrease repeat unintended pregnancy and abortion.

Study design

All women receiving immediate postabortal IUD insertion in eight clinics of a Northern California Planned Parenthood agency during a 3-year period comprise the IUD cohort. We selected a cohort of controls receiving abortions but choosing other, non-IUD contraception on the day of the abortion visit in a 2:1 ratio matched by date of abortion. We obtained follow-up data on repeat abortions within the agency for both cohorts through 14 months after the 3-year period. We evaluated differences in repeat abortion between cohorts. All analyses were intent-to-treat.

Results

Women who received an immediate postabortal IUD had a lower rate of repeat abortions than controls (p<.001). Women who received a postabortal IUD had 34.6 abortions per 1000 woman-years of follow-up compared to 91.3 for the control group. The hazard ratio for repeat abortion was 0.38 [95% confidence interval (CI), 0.27–0.53] for women receiving a postabortal IUD compared to controls. When adjusted for age, race/ethnicity, marital status, and family size, the hazard ratio was 0.37 (95% CI, 0.26–0.52).

Conclusion

Immediate postabortal intrauterine contraception has the potential to significantly reduce repeat abortion.

Introduction

Among the 1.3 million women having abortions annually in the United States, approximately half are repeat procedures [1]. Studies conducted since the legalization of abortion have confirmed that women seeking a repeat abortion are equally [2] or more likely [1], [3], [4], [5], [6] to have been using a contraceptive method at the time of conception than women seeking a first abortion and that, among those who used contraception, they are more likely to have used a relatively effective method [1], [2], [3], [4], [6], [7]. With “typical” use, moderately effective hormonal methods such as the pill, the patch, and the vaginal ring have approximately 8% annual failure rates in the general population [5]. However, in the postabortal population, even much more effective methods, such as depot-medroxyprogesterone acetate, have been shown to have failure rates as high as 16% due to discontinuation [8]. To assist women in avoiding unintended pregnancy, more effective, convenient and long-acting contraception would be advantageous in women with a history of induced abortion.

Intrauterine contraception meets the desired criteria. Its contraceptive efficacy is similar to or better than tubal sterilization [9]. Intrauterine devices (IUDs) are rapidly effective, have high continuation rates (78–81%) compared to other methods [5] and have rapid return to fertility upon removal. They are discreet and do not require multiple repeat visits after insertion for continuation.

Given that up to 83% of abortion clients ovulate within the first cycle after the procedure [10], the risk of repeat pregnancy is high without good contraception. Delayed postabortal IUD insertion may not be adequate with one study showing that 40% of clients did not return for the insertion [11]. Women who have an IUD inserted immediately after an abortion may therefore have significantly fewer unintended pregnancies and repeat abortions than women scheduled for insertion at a follow-up visit. A recent decision analysis comparing immediate to delayed IUD insertion estimated a mean difference of 28 unintended pregnancies per 1000 women in the initial year following abortion [12].

Despite the need for immediate, highly effective contraception following abortion, lingering misperceptions regarding IUD safety exist in the United States among both health care providers and the public [13], [14], [15] and contribute to its low utilization in postabortal women in this country. Furthermore, among the small percentage of patients and their providers who do choose intrauterine contraception, delayed insertion is still the norm. We hypothesize that immediate postabortal IUD insertion will significantly decrease subsequent unintended pregnancy and repeat abortion in comparison to other forms of contraception.

Section snippets

Materials and methods

We conducted a multisite study of three interventions to minimize barriers to IUD use, including immediate postabortal IUD insertion, at a Northern California Planned Parenthood agency from November 2002–October 2005. Results of the original study, including impact on IUD utilization, have been described elsewhere [16]. In March 2004, national Planned Parenthood Standards and Guidelines were individualized for our agency to permit immediate postabortal IUD insertion in the absence of known or

Results

The IUD cohort consisted of 673 women who initiated intrauterine contraception (either copper-T380a or levonorgestrel-releasing intrauterine contraceptive) immediately following an abortion during the study. We selected 1346 matched controls (women who initiated other forms of contraception following an abortion) for a total study population of 2019. Cohorts differed on demographic factors as described in Table 1.

Forty-one women in the IUD cohort (6.1%) and 206 women in the control cohort

Discussion

Women who received immediate postabortal IUD insertion in this population had fewer repeat abortions than those who chose other contraceptive methods following an aspiration abortion during the same time period. The association was strong despite some removals and expulsions during the study, suggesting that immediate IUD insertion may have a powerful effect on prevention of repeat unintended pregnancy.

We also found in our Cox model that younger women have a higher risk for repeat abortion.

Acknowledgments

We would like to thank Madeline Pera-Floyd and Courtney Benedict, CNM, both from the Planned Parenthood Golden Gate, for their assistance with data extraction and review. We would also like to thank Kevin Grumbach, M.D., at the University of California San Francisco, for his methodological guidance and support.

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    Financial support for this study was provided by FEI Women's Health (now DuraMed), producers of ParagardÒ T380A intrauterine copper contraceptive, who sponsored a Staff Training Pilot at Planned Parenthood Golden Gate (part of the intervention study). Ms. Hendlish is concurrently a research consultant for Berlex, Inc (now Bayer Health Care, Inc.), producers of Mirena® levonorgestrel-releasing intrauterine system.

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