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Assessing the Efficacy and Acceptability of Two Missed Period Pills Regimens

Randomized Trial Comparing Progestin With Mifepristone Versus Mifepristone Alone for Use as Missed Period Pills

Status
Not yet recruiting
Phases
Phase 2Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06492889
Enrollment
286
Registered
2024-07-09
Start date
2024-07-22
Completion date
2025-06-30
Last updated
2024-07-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pregnancy Early, Pregnancy Related

Brief summary

The goal of this trial is to examine the efficacy and acceptability of two medication regimens at inducing a return of menses when used 2-8 days after a missed period. The first regimen consists of one dose of 1.5 mg levonorgestrel followed one to two days later by one dose of 200 mg mifepristone. The second regimen will consist of one dose of a placebo pill, followed one to two days later by one dose of 200 mg mifepristone. The investigators will assess and compare the efficacy of both regimens (proportion of women in each group not pregnant at follow-up who were determined to be pregnant at enrollment), and the effectiveness of both regimens (proportion of all participants not pregnant at follow-up among all participants enrolled)

Interventions

DRUGLevonorgestrel

Participants in the levonorgestrel plus mifepristone group will receive one tablet of 1.5 mg levonorgestrel

DRUGMifepristone

Participants in both groups will receive one tablet of 200 mg mifepristone

Sponsors

Cuidado Integral de la Mujer, Gineclinic, S.C.
CollaboratorUNKNOWN
Servicios de Salud Medieg, A. C
CollaboratorUNKNOWN
Gynuity Health Projects
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Caregiver)

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 49 Years
Healthy volunteers
Yes

Inclusion criteria

* Age 15-49 years * General good health * Does not want to be pregnant * History of regular monthly menstrual cycles (+/- 3 days) * Missed menses of 2 to 8 days * Sexual activity in the past month * Willing and able to sign consent forms * Willing to return for a follow-up visit * Willing to provide urine sample at enrollment and follow-up

Exclusion criteria

* Known allergies or contraindications to either study drug * Symptoms or risk factors for ectopic pregnancy * Current use of an IUD, contraceptive implant or injectable

Design outcomes

Primary

MeasureTime frameDescription
Efficacy of the missed period pills regimenTwo weeksProportion of women not pregnant at follow-up who were determined to be pregnant at enrollment
Effectiveness of the missed period pills regimenTwo weeksProportion of women not pregnant at follow-up among all women enrolled, including those who were pregnant and not pregnant at enrollment

Secondary

MeasureTime frameDescription
Effectiveness at inducing return of menses within 10 days of missed mensesOne to two weeksProportion of participants who experience menstrual bleeding after taking the study medications
Safety/side effectsTwo weeksIncidence of side effects and complications
AcceptabilityTwo weeksProportion of participants who report that the missed period pills service was acceptable or highly acceptable

Contacts

Primary ContactManuel Bousieguez
mbousieguez@gynuity.org212-448-1230

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026