Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 840 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07615712Recruiting
Tracking psoriasis treatment response with a new medication
This study follows people starting a new advanced psoriasis treatment to see how well it works over 16 weeks. You'll have three office visits with your dermatologist, and researchers will track your skin improvement to help understand which treatments work best for different patients.
Waltham, MassachusettsAges 18 years+ - NCT07624968Recruiting
Breastfeeding and diabetes risk in future pregnancies
This study follows pregnant women to see if breastfeeding while pregnant with a previous child helps protect against gestational diabetes (high blood sugar during pregnancy) in the current pregnancy. Researchers will track blood sugar levels and ultrasound measurements throughout pregnancy.
IstanbulAges 18–50 - NCT07648602Recruiting
Tracking how psoriasis responds to new advanced treatments
This study follows patients with moderate to severe psoriasis who are starting a new advanced medication for the first time. Researchers will track how well the treatment works early on to understand what helps different patients improve.
Waltham, MassachusettsAges 18 years+ - NCT07653893Recruiting
T-DXd for breast cancer that has spread to the brain
This study is looking at how well the drug trastuzumab deruxtecan (Enhertu) works for women and men with HER2-positive breast cancer that has spread to the brain. Researchers want to see how much of the drug gets into the spinal fluid and if it helps shrink brain tumors.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT07485686Enrolling by invitation
Studying urinary tract infections to improve treatment
This study collects medical data from people with urinary tract infections (UTIs) to help future research and improve how UTIs are treated. You may be eligible if you have symptoms of a UTI now or have had them in the past.
FrankfurtAges 18 years+ - NCT06979024Enrolling by invitation
Observational study of myotonic dystrophy type 1
This study follows people with myotonic dystrophy type 1 over time to learn more about the condition. It is for people of any age who have genetic confirmation of DM1, whether or not they have symptoms.
Fuzhou, FujianAges Any age - NCT04049084Enrolling by invitation
Follow-up study for people treated with gene therapy for ADA-SCID
This is a follow-up (no new treatment) study for people who previously received a gene therapy made from their own cells for ADA-SCID. It mainly tracks long-term safety and whether a marker showing the gene change can still be found.
Los Angeles, CaliforniaAges Any age - NCT04682470Recruiting
Research study following young adults with cancer
This is an observational study that follows young adults with a confirmed cancer diagnosis to learn more about their experience and care. It does not test a new drug, but your information may help improve future cancer treatment and support.
Amsterdam, North HollandAges 18–39 - NCT07165717Recruiting
Real-world study of breathing emergencies in ICU patients
This study looks at why some patients develop severe breathing problems in the ICU. It focuses on people who already have conditions like severe infections, injuries, or heavy bleeding that can stress the lungs.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT05960370Recruiting
Testing a tighter embryo placement technique in natural frozen transfers
This study looks at whether “endometrial compaction” (a technique used during frozen embryo transfer) improves pregnancy and baby outcomes. It focuses on people having a frozen transfer using embryos that test normal on genetic screening.
MadridAges 18–50 - NCT06197412RecruitingPhase 4
Yunnan Baiyao for diabetic foot ulcers at different stages
This study tests whether Yunnan Baiyao, a traditional Chinese herbal medicine, helps heal diabetic foot ulcers at different stages. It looks at how well the medicine works and why, while providing standard wound care.
BeijingAges 18–80 - NCT05812248Recruiting
Tracking heart and blood vessel events after major non-heart surgery
This study follows people after major surgery to see what predicts heart and blood vessel problems later. It does not test a new drug; it mainly collects health information to help clinicians reduce risk.
Guangzhou, GuangdongAges 45 years+ - NCT06601270Recruiting
SCAD registry: tracking spontaneous coronary artery dissection
This study collects information from people diagnosed with spontaneous coronary artery dissection (SCAD) in the last 10 years. It aims to learn more about this rare heart condition to improve future care.
Buenos AiresAges 18 years+ - NCT06510205Recruiting
Long-term safety of Mentor breast implants in Chinese women
This study follows women who have Mentor breast implants for 5 years to check their long-term safety. It collects information from your medical records and follow-up visits to monitor how the implants are doing.
ChengduAges 18–100 - NCT07655583Recruiting
Skipping radiation after brain surgery
This study is for people with melanoma or lung cancer that has spread to the brain and who have had surgery to remove the brain tumor. It looks at whether it is safe to skip the usual radiation treatment after surgery, while taking a targeted drug therapy that is known to be effective in the brain.
Houston, TexasAges 18 years+ - NCT03936335Recruiting
Study women with atopic dermatitis during pregnancy
This is an observational study that looks back at medical and pharmacy records of women with atopic dermatitis around pregnancy. It may help researchers better understand how this condition affects pregnant patients and pregnancy-related care.
Boston, MassachusettsAges 18–49 - NCT07702357Enrolling by invitation
Preschool outcomes study for ReDiMOM children
This study follows up on children who were part of the ReDiMOM study to see how they are doing in preschool. It helps researchers understand the long-term effects of the earlier study.
Chicago, IllinoisAges 2–6 - NCT04113447Recruiting
Mitochondrial donation study for parents of confirmed mtDNA mutation
This study follows families using mitochondrial donation to reduce the risk from a confirmed mitochondrial DNA (mtDNA) mutation. It aims to learn outcomes over about 18 months of the child’s life and whether the treatment works well and safely for families like yours.
Newcastle upon Tyne, Tyne & WearAges Any age - NCT04829526Recruiting
Study of suspected Guillain-Barré syndrome cases
This is an observational study that looks at people who were suspected to have Guillain-Barré syndrome and were cared for at University Hospital of Basel in the past. It does not test a new treatment—researchers review existing care to learn more about this condition.
BaselAges 18 years+ - NCT04845867Recruiting
Test accuracy of a thyroid surgery diagnostic product
This study looks at how well a diagnostic medical product works during routine thyroid surgery. It may help surgeons and care teams choose better next steps based on what the test shows.
HaushamAges 18 years+ - NCT05562323Recruiting
Study of immune response after monkeypox vaccination
This is an observational study that follows adults after they get a monkeypox vaccine to learn how their immune system responds. The results may help researchers understand what types of protection the vaccine creates.
Badalona, BarcelonaAges 18 years+ - NCT05784038Recruiting
Study of monkeypox infection in Brazil
This is an observational study that follows people with confirmed monkeypox (mpox) to better understand the illness over time. It may help doctors learn what to expect and improve care, but it does not test a new treatment.
Belém, ParáAges 18 years+ - NCT06062576RecruitingPhase 4
Yunnan Baiyao for diabetic foot ulcers
This study tests whether Yunnan Baiyao, a traditional Chinese medicine, helps heal diabetic foot wounds at different stages. It aims to see if it can reduce infection and promote new tissue growth.
Beijing, Beijing MunicipalityAges 18–80 - NCT06162234Recruiting
High Myopia Study in Wuhan
This study looks at how high myopia (severe nearsightedness) affects the eye over time. It aims to better understand the condition and improve care for people with high myopia.
Wuhan, HubeiAges 18–65
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 840 recruiting observational study 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 observational study 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 observational study 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.