Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 824 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- 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+ - 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 - NCT04114578Recruiting
Study of babies and children with diaphragm hernia
This is an observational study that follows babies and children with congenital diaphragm hernia (CDH) to learn more about their health and care over time. It may help doctors better understand which factors affect outcomes.
Montreal, QuebecAges Up to 17 years - 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+ - NCT07585097Recruiting
Long-term Safety Study of Odevixibat for Alagille Syndrome
This study follows patients with Alagille syndrome who are taking odevixibat to see how safe the medicine is over time. Alagille syndrome is a rare liver disease that affects bile flow, and odevixibat is a treatment that may help reduce itching and improve liver function.
BronAges 6 months+ - NCT07563205Recruiting
Study of Chemotherapy and Amivantamab for Advanced Lung Cancer
This study follows patients with advanced lung cancer (a type called non-small cell lung cancer) who are receiving a combination of chemotherapy and a drug called amivantamab. Researchers want to understand how well this treatment works and track your health outcomes over time.
Aix-en-ProvenceAges 18 years+ - NCT07517458Recruiting
Understanding anxiety before cancer surgery in hospitalized patients
This study looks at how anxious cancer patients feel before surgery and tests a new way to measure that anxiety. It's observational—meaning researchers watch and listen rather than give treatments—to help doctors better support patients emotionally before procedures.
Aviano, PordenoneAges 18 years+ - NCT07512518Recruiting
Study of Long-Term Viral Brain Infections
This study follows patients with chronic viral infections affecting the brain and spinal cord. Researchers will collect spinal fluid samples and track your health over one year to better understand these infections and improve care.
Beijing, Beijing MunicipalityAges 14 years+ - NCT07481526Recruiting
Chronic kidney disease registry study
This study is collecting information from people with chronic kidney disease (CKD) to understand how the disease progresses over time. It does not test any new treatments, so you keep your usual care.
Anning, Yunnan - South RegionAges Any age - NCT04701047Recruiting
Study of symptoms in vaginal prolapse patients
This is an observational study that follows women with vaginal prolapse to better understand symptoms and patient experiences. It may help improve future care, even though it does not test a new treatment.
GhentAges 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+ - NCT07471243Recruiting
Dressing and wound care experiences after hip or knee replacement
This study looks at how people care for their surgical wounds and dressings after hip or knee replacement surgery. It aims to learn what helps patients feel more comfortable and confident in their recovery.
Bournemouth, DorsetAges 18 years+ - NCT07448740Recruiting
Stepwise milk protein introduction after failed challenge
This study looks at a gradual method of introducing heated milk proteins to children who previously had a reaction to unheated cow's milk. It aims to help build tolerance over time.
BonheidenAges 1–18 - NCT06769529Recruiting
Study of adults with congenital heart disease
This study follows adults born with a heart condition to see how they do over time, whether they had surgery or not. It aims to learn more about their health journey.
BolognaAges 18 years+ - NCT07432932Recruiting
Personalized treatment before surgery for high-risk sarcoma
This trial tests a precision medicine approach by giving targeted therapy before surgery for high-risk soft tissue sarcoma. The goal is to see if matching treatment to your tumor's type can improve outcomes.
LondonAges 18 years+ - NCT07419997Recruiting
Observational study on clot-busting drugs beyond the usual window
This study looks at patients who received a clot-busting drug (intravenous thrombolysis) for their stroke 4.5 to 24 hours after symptoms started. It aims to see how well this works and what happens to them, using data that has already been collected.
BeijingAges 18 years+ - NCT07330258Recruiting
Observing Parkinson's over time in people still having movement symptoms
This study follows people with Parkinson's disease who still have movement symptoms despite taking medication. It aims to understand how the disease changes over time, which could help improve future treatments.
Phoenix, ArizonaAges 45–75 - NCT06866912Recruiting
Observational study of amyloidosis and TTR gene carriers
This study is observing people with amyloidosis or those who carry a specific gene mutation (transthyretin) to learn more about the condition. It does not test any new treatment, but may help researchers understand how the disease affects people.
BolognaAges 18–99 - NCT07312227Recruiting
Pregnancy at high altitude study
This study follows pregnant women living at high altitude in Bolivia to understand how pregnancy differs from those at sea level. It may help improve care for mothers and babies in high-altitude regions.
Boston, MassachusettsAges 18–45 - NCT07299981Recruiting
Brain water changes after clot-busting drug for stroke
This study looks at how much water builds up in brain tissue after a stroke is treated with a clot-busting drug. It may help doctors understand who will recover better.
ViennaAges 18 years+ - NCT07292857Recruiting
Respiratory infection risk in postmenopausal women on HRT or not
This study looks at how the risk of respiratory infections (like colds or flu) may differ in postmenopausal women who use hormone replacement therapy (HRT) and those who do not. You will wear a smartwatch for six months and track your health through a smartphone app.
BernAges 40–60 - NCT07288515Recruiting
Acalabrutinib for CLL in routine care
This study follows people with CLL who are starting acalabrutinib (a targeted pill) for the first time, either as their first treatment or after previous therapies. The goal is to see how well it works in everyday medical practice.
GrodnoAges 18 years+ - NCT07287241Recruiting
Heart health study for people with osteogenesis imperfecta
This study looks at heart structure and function in children and adults with osteogenesis imperfecta (OI), a condition that affects bones. Researchers want to understand how OI may impact the heart.
Bologna, Emilia-RomagnaAges 5–80 - NCT06512571Recruiting
Heart changes in Fabry disease: an observational study
This study looks at people with Fabry disease, a genetic condition that can cause the heart muscle to thicken. Researchers want to understand how the heart's blood vessels change over time, which may help improve care for Fabry disease.
BeijingAges 18 years+
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 824 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.