Clinical trials
Frozen Embryo Transfer (FET) clinical trials
Below are recruiting frozen embryo transfer (fet) clinical trials, each written for real people, not researchers. We’re tracking 20 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07358468Recruiting
How womb lining movement affects frozen embryo transfer success
This study looks at how different ways of preparing the uterus for a frozen embryo transfer affect the natural wavelike movements of the womb lining (endometrial peristalsis). It may help doctors choose the best protocol for you.
Ho Chi Minh CityAges 18–42 - NCT06307184Recruiting
Natural cycle frozen embryo transfer convenience study
This study is testing whether starting a frozen embryo transfer during your natural cycle (after ovulation) is more convenient than the usual schedule. You will take progesterone (400 mg twice a day) and have one embryo transferred. It is for people using donor eggs who have regular cycles.
LisbonAges 18–49 - NCT06304792Recruiting
Immediate vs. later frozen embryo transfer in women with regular or irregular cycles
This trial compares transferring a frozen embryo right away versus waiting for a later cycle. It is designed for women with regular or irregular menstrual cycles who have at least one good-quality frozen embryo.
CopenhagenAges 18–40 - NCT06859944Recruiting
Comparing two types of frozen embryo transfer preparation
This trial compares two ways to prepare the uterus for a frozen embryo transfer: a natural cycle or a new method using hormonal stimulation during the early part of the cycle. It may help improve success rates for people using their own eggs and sperm.
BrusselsAges 18–45 - NCT07461909Recruiting
Comparing Two Types of Vaginal Progesterone for Frozen Embryo Transfer
This study compares two forms of vaginal progesterone used to prepare the uterus for a frozen embryo transfer (FET). It may be a good option if you are already prescribed one of these progesterone regimens and are planning a single embryo transfer.
LisbonAges 18–48 - NCT06896617RecruitingPhase 4
Corpus Luteum's effect on frozen embryo transfer pregnancies
This study looks at whether having a corpus luteum (the structure left after an egg is released) affects pregnancy outcomes in frozen embryo transfer cycles. It aims to help doctors choose the best way to prepare the body for embryo transfer.
Barcelona, SpainAges 18–41 - NCT06875752RecruitingPhase 4
Does frozen embryo transfer need luteal support?
This trial checks if taking extra hormones after a frozen embryo transfer (called luteal support) is needed when using your natural cycle. It may help improve pregnancy chances.
Budapest, BudapestAges 18–40 - NCT07681115Recruiting
Vitamin D and pregnancy after frozen embryo transfer
This study looks at how vitamin D levels affect pregnancy success after a frozen embryo transfer. If you are a woman planning this procedure at Fakih IVF, you may be able to join to help researchers understand the link between vitamin D and pregnancy outcomes.
Abu DhabiAges 18–40 - NCT07675213Recruiting
Uterine muscle movements and pregnancy after frozen embryo transfer
This trial explores how natural uterine contractions affect pregnancy success in women using hormone therapy for frozen embryo transfer. It may help doctors understand if uterine activity influences implantation.
Ho Chi Minh CityAges 18–42 - NCT06006091Recruiting
Letrozole for preparing the womb before embryo transfer
This study tests if a medicine called letrozole can help prepare the lining of the womb for a frozen embryo transfer. It may be an option for women under 40 who have had limited previous IVF cycles.
ShanghaiAges Up to 40 years - NCT06644794RecruitingPhase 3
Progesterone timing for frozen embryo transfer
This trial compares two ways of timing progesterone support for frozen embryo transfer in women with regular cycles. It aims to find which approach gives the best chance of pregnancy.
Jinan, ShandongAges 21–44 - NCT07088640Recruiting
Comparing two ways to warm frozen embryos for transfer
This trial compares two methods of warming frozen embryos before transfer—one with a single step and one with multiple steps. It aims to see which approach leads to better pregnancy outcomes for women using their own frozen embryos.
Ho Chi Minh City, CityAges 18 years+ - NCT07171970Recruiting
IVM vs IVF for women with PCOS
This trial compares two fertility treatments for women with PCOS: in vitro maturation (IVM) with fresh embryo transfer versus standard IVF with frozen embryo transfer. It aims to find which approach leads to better outcomes.
Ho Chi Minh CityAges 18–42 - NCT07257250Recruiting
Levothyroxine for IVF in women with mild thyroid issues
This study tests whether taking levothyroxine (a thyroid hormone medication) before IVF or ICSI with frozen embryo transfer improves pregnancy rates in women with subclinical hypothyroidism (a mild thyroid condition). It aims to see if this treatment helps women like you have a better chance of getting pregnant.
Ho Chi Minh City, Ho Chi MinhAges 18–45 - NCT06471140Enrolling by invitation
Heart Health in Pregnancy After Frozen Embryo Transfer
This study looks at how the heart and blood vessels adjust during pregnancy in women who became pregnant after a frozen embryo transfer (FET) using IVF. It aims to understand if different types of FET cycles affect maternal health, and may help improve future fertility care.
AalborgAges 18–40 - NCT06762626Recruiting
Comparing two methods of timing a frozen embryo transfer
This trial compares a new method to time a frozen embryo transfer (using a test called ERA) with the standard method. The goal is to find the best time to transfer a high-quality embryo in women who have had multiple failed IVF attempts (recurrent implantation failure).
Hong KongAges 18–40 - NCT07216742RecruitingPhase 3
Study of a fertility drug for women undergoing IVF with frozen embryo transfer
This trial tests a medication called human menopausal gonadotropin to help women undergoing IVF achieve a live birth. It focuses on the cumulative success rate after freezing and later transferring embryos.
Encino, CaliforniaAges 18–42 - NCT05798624Recruiting
FET pregnancy chances after a prior C-section
This study looks at whether a history of a C-section affects the chance of pregnancy when transferring one frozen, euploid embryo. It may help doctors estimate your odds and plan care for future embryo transfers.
Abu DhabiAges 18–42 - NCT07349966Enrolling by invitation
Biopsy effects on children born after genetic testing
This study compares children born after preimplantation genetic testing with a small biopsy of the embryo to those born without such testing. It aims to see if the biopsy affects a child's health and development during their first year of life.
Milan, MilanoAges Up to 5 years - NCT06165367Recruiting
Does hyaluronan in the medium improve embryo transfer success?
This trial tests if adding hyaluronan to the liquid used during embryo transfer helps increase the chance of a successful pregnancy. It is for women who have at least one genetically normal embryo (tested with PGT-A) that was frozen on day 5 and are using hormone replacement therapy to prepare the uterus.
Abu Dhabi, Abu Dhabi EmirateAges 18–46
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Common questions
- Are there clinical trials for frozen embryo transfer (fet)?
- Yes. Clin2 currently lists 20 recruiting frozen embryo transfer (fet) studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a frozen embryo transfer (fet) trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a frozen embryo transfer (fet) trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.