Letrozole Versus Mifepristone and Misoprostol in Silent Miscarriage (NCT06733727) | Clinical Trial Compass
Not Yet RecruitingNot Applicable
Letrozole Versus Mifepristone and Misoprostol in Silent Miscarriage
884 participantsStarted 2024-12-06
Plain-language summary
Management of first trimester silent miscarriage can be by expectant, medical or surgical management. Surgical management by suction evacuation is associated with surgical risks (including risks to the womb that can affect further pregnancy), anaesthetic risks and hospital stay. Medical management of first trimester silent miscarriage using misoprostol is another common option that can reduce the risk of bleeding and those associated with surgery. However, the current standard management of using misoprostol for the management of first trimester miscarriage only has a success rate of 70-80%, which is suboptimal.
Recent large studies have shown that adding mifepristone pre-treatment before misoprostol in the management of silent miscarriage can improve the success rates of complete miscarriage after medical management. There are 2 problems with mifepristone. Firstly, it is not widely available in many countries for cultural and religious reasons because it is labelled as an 'abortifacient'. Secondly, it is expensive. One tablet of Mifepristone costs $500 HK dollars. There is a need to look for an alternative to mifepristone.
Letrozole is an aromatase inhibitor which can reduce estrogen levels. Some studies have shown that it can improve the success rate of medical management of silent miscarriage and termination of pregnancy. It is safe, more widely available and cheaper than mifepristone.
This is a randomized double blinded trial comparing the use of mifepristone versus letrozole as pre-treatment in the medical management of first trimester silent miscarriage using misoprostol.
Who can participate
Age range
18 Years
Sex
FEMALE
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Diagnosed with silent miscarriage \<= 12 weeks of gestation by ultrasonography
* Single intrauterine gestational sac
* No heavy per-vaginal bleeding
* No severe abdominal pain
* No features of intrauterine infection
* Able to understand the proposed research and able to comply with instructions
* Having given voluntary written informed consent
Exclusion Criteria:
* Known allergy to mifepristone, misoprostol or letrozole
* On drugs with potential drug interactions with mifepristone e.g. aspirin, clopidogrel, anti-coagulants etc.
* Suspected ectopic or molar pregnancy or multiple pregnancy
* Distorted uterine cavity by uterine septum or submucosal fibroids
* Presence of intrauterine contraceptive device
* History of bleeding tendencies e.g. haemorrhagic diseases, current anti-coagulant treatment
* Previous history of retained products of gestation/ failed medical management of miscarriage
* Opt for expectant or surgical management of miscarriage
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.