Accuracy of a semi-quantitative urine pregnancy test compared to serum beta-hCG measurement: a possible screening tool for ongoing pregnancy after medication abortion

Medication Abortion Up to 70 Days of Gestation

Medication abortion, also referred to as medical abortion, is a safe and effective method of providing abortion. Medication abortion involves the use of medicines rather than uterine aspiration to induce an abortion. The U.S. Food and Drug Administration (FDA)-approved medication abortion regimen includes mifepristone and misoprostol. The purpose of this document is to provide updated evidence-based guidance on the provision of medication abortion up to 70 days (or 10 weeks) of gestation. Information about medication abortion after 70 days of gestation is provided in other ACOG publications [1].

Results of a pilot study in the U.S. and Vietnam to assess the utility and acceptability of a multi-level pregnancy test (MLPT) for home monitoring of hCG trends after assisted reproduction

Background

To evaluate the utility and acceptability of using multi-level pregnancy tests (MLPTs) at home to monitor hCG trends following assisted reproductive technology (ART).

Methods

One hundred and four women presenting for ART at either Stanford Medicine Fertility and Reproductive Health Clinic (Stanford, CA) or Hung Vuong Hospital (Ho Chi Minh City, Vietnam) participated in this pilot study. Women were asked to perform the MLPT at home, primarily on days when they were also scheduled to receive standard clinic-based serum hCG testing. These tests were administered up to 6 times over the 6-week period following embryo transfer or intrauterine insemination (IUI). Concordance of serial hCG readings for each time point was assessed by comparing trends in urine MLPT results with trends in serum hCG. Stable or increasing hCG level was interpreted as an indication of a progressing pregnancy, while a declining hCG was interpreted as a lack of established or progressing pregnancy. At study end, all participants were asked about the acceptability and convenience of using the MLPT at home for monitoring hCG trends following ART.

Results

Data from both urine and serum testing are available for 156 of 179 clinic visits (87.2%). There was high concordance of serial trend results between the two types of tests: among the 156 sets of serum and urine hCG data points, 150 (96.2%) showed a matching trend in hCG pattern and 6 (3.8%) resulted in a discordant trend. Seventy-three percent of women reported being satisfied or very satisfied with using the MLPTs at home. Almost all (96.6%) said that the MLPT was easy or very easy to use.

Conclusion

The MLPT offers women and health care providers a client-friendly diagnostic tool to detect very early pregnancy and monitor its progress.

Trial registration

This study was registered on clinicaltrials.gov as NCT01846403 (May 1, 2013), and NCT01919502 (August 5, 2013).

Administration of the etonogestrel contraceptive implant on the day of mifepristone for medical abortion: a pilot study

OBJECTIVE

We sought to determine satisfaction and continuation rates of the contraceptive implant when placed on the initial visit for first-trimester medical abortion.

STUDY DESIGN

In this pilot study, we placed the implant within 15 min of mifepristone administration. We assessed satisfaction with implant placement timing, 1-year implant continuation and abortion completion.

RESULTS

We enrolled 20 participants. Sixteen (80%) returned for follow-up, and all had complete abortion. At 1 year, of 16 participants contacted, 14 (87.5%) were satisfied with implant insertion timing, and 14 (87.5%) continued the implant.

CONCLUSIONS

Initiation of the contraceptive implant on the initial visit for medical abortion resulted in high satisfaction and continuation rates.

IMPLICATIONS

This pilot study provides important groundwork for future larger studies to assess initiation of the contraceptive implant on the day of mifepristone for medical abortion.

Medical abortion follow-up with serum human chorionic gonadotropin compared with ultrasonography: a randomized controlled trial

OBJECTIVE

To estimate whether follow-up with serum human chorionic gonadotropin (hCG) results in fewer unplanned visits and interventions than follow-up with ultrasonography.

METHODS

Women were randomized to either in-clinic serum hCG or ultrasound follow-up after medical abortion. The primary outcome, unplanned interventions and visits, was measured as a composite binary outcome including: additional clinic or emergency room visits, repeat dosing of misoprostol, and surgical evacuation of the uterus. Surveys were administered at initial follow-up and again 1 month after abortion to inquire about unscheduled visits, interventions, and patient satisfaction. Medical records were reviewed for evidence of additional interventions and visits.

RESULTS

A total of 376 patients was randomized. Most participants were white (56%), single (83%), nulliparous (63%), and had completed high school (96%). Average participant age was 26±6 years and average gestational age was 46±6 days. Within 2 weeks of abortion, there was no significant difference in the rate of unplanned interventions and visits between arms, 8.2% (13/159) in the serum hCG arm compared with 6.6% (10/151) in the ultrasound arm (relative risk 1.23, 95% confidence interval [CI] 0.56-2.73, P=.60). By 4 weeks postabortion, 4.4% (6/135) in the ultrasound arm and 1.4% (2/142) in the hCG arm had undergone surgical evacuation (relative risk 0.32, 95% CI 0.07-1.54, P=.16). The majority in both the serum hCG (88%) and ultrasound (95%) arms was satisfied with their assigned follow-up method.

CONCLUSION

Medical abortion follow-up with serum hCG does not reduce the rate of unplanned interventions and visits compared with ultrasonography. Overall, the number of unplanned interventions is low and both methods of follow-up are acceptable to women.

Simplified medical abortion using a semi-quantitative pregnancy test for home-based follow-up

OBJECTIVE

To simplify follow-up after medical abortion by examining whether women could use a semi-quantitative pregnancy test at home to screen for ongoing pregnancy.

METHODS

Three hundred women seeking medical abortion at a tertiary hospital in Vietnam participated in the study. Participants used a semi-quantitative pregnancy test at the hospital to estimate baseline human chorionic gonadotropin (hCG) levels and administered another test at home 2 weeks later for comparison. Women interpreted the test result at home and then returned to hospital for follow-up care. At this visit, self-assessment was verified. To assess further the feasibility of the test as a follow-up tool in service delivery, 200 additional women completed a user comprehension survey.

RESULTS

The tests identified all 11 ongoing pregnancies among study participants (100% sensitivity; 89.7% specificity). Women reported that the test was easy to use (255/292 [87.3%]) and that provider instructions helped them to use the test (291/292 [99.7%]).

CONCLUSION

Semi-quantitative pregnancy tests offer high sensitivity and negative predictive value. If user instructions can be further simplified, the tests could be used in lieu of transvaginal ultrasound and/or serum hCG at clinic-based follow-up or by women themselves for home-based follow-up. Clinical trials.gov:NCT01150279.

Can at-home semi-quantitative pregnancy tests serve as a replacement for clinical follow-up of medical abortion? A US study

BACKGROUND

Medical abortion in the United States requires clinic-based follow-up, representing additional time and cost to women and clinics. We studied a semi-quantitative home pregnancy test as a possible replacement for in-person follow-up.

STUDY DESIGN

Four hundred and ninety women participated in the clinical study and used a pregnancy test to determine baseline human chorionic gonadotropin (hCG) on the day of mifepristone administration and follow-up hCG 1 week later. One hundred and eighty-nine other women completed a user comprehension survey. Accuracy, feasibility and acceptability of the test were assessed in both the clinical study and the survey.

RESULTS

The test identified the one ongoing pregnancy in the clinical study cohort. Sensitivity and specificity were calculated at 100.0% and 97.0%. The majority of participants in both the clinical study and the user comprehension survey found the test to be "very easy" or "easy" to use.

CONCLUSION

At-home follow-up with a semi-quantitative pregnancy test is feasible for service delivery in the United States.

Alternatives to a routine follow-up visit for early medical abortion

OBJECTIVE

To evaluate the ability of women and their providers to assess abortion outcome without the routine use of ultrasonography.

METHODS

This multicenter trial enrolled 4,484 women seeking medical abortion at 10 clinics in the United States. Women received the standard medical abortion care with mifepristone-misoprostol in those clinics and blinded clinical assessments before follow-up ultrasonography. Data were collected prospectively on abortion outcomes, receipt of additional treatment, and clinical, laboratory, and ultrasound assessments associated with the procedure. We constructed five model algorithms for evaluating women's postabortion status, each using a different assortment of data. Four of the algorithms (algorithms 1-4) rely on data collected by the woman and on the results of the low-sensitivity pregnancy test. Algorithm 5 relies on the woman's assessment, the results of the pregnancy test, and follow-up physician assessment (sometimes including bimanual or speculum examination).

RESULTS

A total of 3,054 women received medical abortion and had adequate data for evaluation. Twenty women (0.7%) had an ongoing pregnancy; 26 (0.9%) received curettage for retained tissue, empiric treatment for possible infection, or both; and 55 (1.8%) received additional uterotonics or other medical abortion-related care. Screening algorithms including patient-observed outcomes, a low-sensitivity pregnancy test, and nonsonographic clinical evaluation were as effective as sonography in identifying women who received interventions at or after the follow-up visit.

CONCLUSION

Relying on women's observations, a low-sensitivity pregnancy test, and clinical examination, women and their providers can accurately assess whether follow-up care is required after medical abortion without routine ultrasonography.

CLINICAL TRIAL REGISTRATION

ClinicalTrials.gov, www.clinicaltrials.gov, NCT00120224.

LEVEL OF EVIDENCE

II.

Medication abortion

Medical methods for pregnancy termination in early gestation offer women an alternative to surgical evacuation and have the potential to improve access globally to safe abortion. Several drug regimens are used with varying efficacy including mifepristone plus misoprostol, misoprostol alone, and methotrexate plus misoprostol. Where available, a mifepristone plus misoprostol regimen is most frequently used and is highly effective for early abortion. We review these drug regimens along with clinical practice recommendations including patient counseling and selection, regimen administration location, expected side effects, and follow-up procedures. Overall, women who choose medical abortion report high levels of satisfaction.