A Phase 3 interventional study of Investigator's choice of Chemotherapy and Azenosertib in Ovarian Cancer, sponsored by K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc. Recruiting at 129 sites in 22 countries. Open to female participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-11-09.
Sponsored by K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc · Phase 3, Interventional, and Treatment
Argentina, Brazil, Croatia, Denmark, Estonia, Finland, Israel, Netherlands, Portugal, Puerto Rico
Help build ClinicalTrials.gg — short surveys, remote interviews or testing, in your language. Take part →
Among 1,778 studies in Ovarian Neoplasms with a site in United States — 280 open to participants now, 455 under way, 46 of them phase 3. Ovarian Neoplasms · United States.
Among the 1,778 studies in Ovarian Neoplasms with a site in United States, this one is the 137th largest by planned enrollment of the 1,497 interventional ones that give a count, is one of 64 that started in 2026, is one of 103 in phase 3, reaches primary completion later than 312 of the 453 other live ones, and was the 1,743rd registered.
3,385 studies on the registry are indexed under Ovarian Neoplasms; 792 are open to participants now.
Browse Ovarian Neoplasms studies →280 of the 1,778 studies in Ovarian Neoplasms with a site in United States are open now. Recruiting first, the newest first:
Michael J. Goodheart · Sites in United States
Ages 18–99 · Women only
Crescent Biopharma, Inc. · Sites in United States
Ages 18+
Merck Sharp & Dohme LLC · Sites in United States, Israel, Taiwan
Ages 18+ · Women only
University of Alabama at Birmingham · Sites in United States
Ages 18+
GE Healthcare · Sites in United States, Sweden
Ages 18+
A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →
Of the 605 Ovarian Neoplasms studies recruiting now, 442 (73%) set no upper age limit and 107 (18%) stop at 75 or younger; 39 take children under 18; 45 take healthy volunteers.
This study: 18 Years and older · female · no healthy volunteers.
The full table on the hub →This tab as a report to print or save as PDF → With an account.
1,778 studies; the count open now beside each. This study's row is marked.
A study in two phases is counted once above. Listed by phase, each with its combined phases: Phase 1 768 · Phase 2 718 · Phase 3 114 · Phase 4 8
First in 1980; this study’s year is marked. 64 started in 2026.
By drug class, each counting the studies that test any of its medicines:
This study's planned enrollment of 420 is above the median of 54 across 2,552 interventional studies indexed under Ovarian Neoplasms.
Median enrollment 47 across the 1,497 interventional studies, 176 across the 195 observational. Of the 1,208 that completed or were terminated, 445 (37%) have results posted.
This tab as a report to print or save as PDF → With an account.
712 of 1,778 have an industry lead sponsor. The 10 most frequent:
K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc is the lead sponsor of 8 studies on the registry; 3 are open to participants now.
Of its 5 completed or terminated interventional studies of FDA-regulated products, 0 (0%) have results posted.
K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc has 3 studies filed under Ovarian Neoplasms — fewer than ten, so there is no comparison to draw.
163 of the studies in Ovarian Neoplasms with a site in United States that are under way reach primary completion within a year, 9 of them phase 3. Phase 3 first, then by date:
| Study | Primary completion |
|---|---|
| NCT03815643Phase 3EMD Serono Research & Development Institute, Inc.Avelumab Program Rollover Study | 2026-11-24 |
| NCT05281471Phase 3Genelux CorporationEfficacy & Safety of Olvi-Vec and Platinum-doublet + Bevacizumab Compared to Physician's Choice of Chemotherapy and Bevacizumab in Platinum-Resistant/Refractory Ovarian Cancer (PRROC) (OnPrime, GOG-3076) | 2026-12 |
| NCT04498117Phase 3CanariaBio Inc.Oregovomab Plus Chemo in Newly Diagnosed Patients With Advanced Epithelial Ovarian Cancer Following Optimal Debulking Surgery | 2026-12-26 |
| NCT05059522Phase 3PfizerContinued Access Study for Participants Deriving Benefit in Pfizer-Sponsored Avelumab Parent Studies That Are Closing | 2026-12-31 |
| NCT04095364Phase 3NRG OncologyLetrozole With or Without Paclitaxel and Carboplatin in Treating Patients With Stage II-IV Ovarian, Fallopian Tube, or Primary Peritoneal Cancer | 2027-02-01 |
Add all 163 to your calendar (.ics) → With an account.
Among the 1,778 studies in Ovarian Neoplasms with a site in United States, from their registry updates:
This tab as a report to print or save as PDF → With an account.
This is a randomized, Phase 3 trial designed to evaluate the efficacy and safety of azenosertib compared to Investigator's choice of chemotherapy in subjects with platinum-resistant ovarian cancer whose tumors are positive for cyclin E1 protein expression.
A Phase 3 study to evaluate the efficacy, safety, and overall clinical benefit of azenosertib (ZN-c3) compared with Investigator's choice of chemotherapy in subjects with Platinum-Resistant, High-Grade Serous Ovarian, Fallopian Tube, or Primary Peritoneal Cancer. Azenosertib is a selective and orally bioavailable inhibitor of WEE1. In HGSOC, high Cyclin E1 protein drives replication stress and increases tumor reliance on WEE1-mediated G2/M checkpoint control. Treating tumor cells with azenosertib promotes premature cell cycle progression leading to increased replication stress and accumulation of DNA damage pushing cells to mitotic catastrophe resulting in tumor cell death.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Prior Therapy:
Exclusion Criteria:
A serious illness or medical condition(s) including, but not limited to, the following:
Any of the following treatment interventions within the specified time frame before randomization:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.
The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.
The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.
“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).
Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.
Cancer that has spread to the leptomeninges, the thin layers covering the brain and spinal cord, and the fluid between them. It is not the same as brain metastases.
Criteria often treat it separately, and many studies leave it out even where treated brain metastases are allowed.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Measurable disease
The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.
The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
RECIST
The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.
“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ECOG performance status
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Cancer (malignancy)
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Relapsed and refractory
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Brain metastases
Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).
Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Leptomeningeal disease
Cancer that has spread to the leptomeninges, the thin layers covering the brain and spinal cord, and the fluid between them. It is not the same as brain metastases.
Criteria often treat it separately, and many studies leave it out even where treated brain metastases are allowed.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
NYHA class (heart failure)
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Allogeneic and autologous transplant
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Drug: Azenosertib
Drug: Investigator's choice of Chemotherapy
The investigator will select the chemotherapy in accordance with the protocol defined requirements. The possible choices as defined by the protocol: * Paclitaxel * Gemcitabine * Pegylated liposomal doxorubicin (PLD) * Topotecan The selected chemotherapy will be administered intravenously
Azenosertib 400 mg will be administered orally.
Also known as: ZN-c3
Progression free survival (PFS) per RECIST v1.1 as assessed by Investigator
Time from randomization to the first documented tumor progression (per RECIST v1.1) or death from any cause, whichever occurs first.
Time frame: Up to approximately 24 months from the enrollment of the last subject
Overall survival
Time from randomization until death due to any cause
Time frame: Up to approximately 24 months from the enrollment of the last subject
PFS per RECIST 1.1 as assessed by blinded independent central review (ICR)
Time from randomization to the first documented tumor progression (per RECIST v1.1) or death from any cause, whichever occurs first.
Time frame: Up to approximately 24 months from the enrollment of the last subject
Objective Response Rate (ORR) per RECIST v1.1 and assessed by Investigator
Proportion of patients who attain a partial response (PR) or complete response (CR) per RECIST v1.1
Time frame: Up to approximately 24 months from the enrollment of the last subject
Change from baseline in European Organization for the Research and Treatment of Cancer Quality of Life Questionnaire score (EORTC QLQ)-Core 30 (C30) at each post baseline visit
Assess changes over time in cancer-specific and patient-reported outcome instruments assessing global health status/quality of life, functional domains, and symptom burden.
Time frame: Up to approximately 24 months from the enrollment of the last subject
Change from baseline in European Organization for the Research and Treatment of Cancer Quality of Life Questionnaire score (EORTC QLQ)-OV28 at each post baseline visit
Assess changes over time in cancer-specific and patient-reported outcome instruments assessing global health status/quality of life, functional domains, and symptom burden.
Time frame: Up to approximately 24 months from the enrollment of the last subject
Change from baseline in EQ-5D-5L score at each post baseline visit
Assess changes over time in cancer-specific and patient-reported outcome instruments assessing global health status/quality of life, functional domains, and symptom burden.
Time frame: Up to approximately 24 months from the enrollment of the last subject
Number of Subjects experiencing treatment emergent adverse events (TEAEs)
Assess adverse events occurring for the first time or worsening of a pre-existing event during the treatment period until 30 days after the last dose of study drug
Time frame: Up to approximately 24 months and 30 days from the enrollment of the last subject
Showing the first 100 of 129 sites across 22 countries. Choose a country and city above to see the rest.
Plan to share: Undecided
No publications or documents are linked to this record.
Started Apr 2026 (actual). Primary completion is estimated for May 2028, 25 months after the start.
Of 73 industry-sponsored phase 3 interventional studies under Ovarian Neoplasms, half reached primary completion within 45 months of starting (the median), counting those still running; a quarter within 34 and three quarters within 72. This study's planned 25 months is below that.
Counting every sponsor, half of 125 studies reached it within 59 months; a quarter within 37 and three quarters within 89.
How these figures are worked out, and which studies are left out of them.
Argentina, Brazil, Croatia, Denmark, Estonia, Finland, Israel, Netherlands, Portugal, Puerto Rico
Argentina, Brazil, Croatia, Denmark, Estonia, Finland, Israel, Netherlands, Portugal, Puerto Rico
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Studies of the drug tested here: Azenosertib
K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc