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Progesterone

Phase 1

Pre Term Birth | Small molecule | Other |Dare Bioscience, Inc.|Last Updated: May 8, 2026

Target and mechanism

Molecular targetPGR
Target classAgonist
ModalitySmall molecule
ChEMBLCHEMBL103

Success Probability

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Market & Valuation

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Trial Design

ACTIVE_CONTROLLED
Total Trials1
Total Enrollment60

FDA Designations

No designations recorded

Clinical trial landscape

Progesterone · 1 trial · 1 indication

Phase 1 1
NCT06668896Comparing the Pharmacokinetics of a Progesterone Ring Versus a Progesterone Vaginal InsertPre Term Birth
NOT YET_RECRUITING60 Analytics
PHASE1NOT YET_RECRUITING
Comparing the Pharmacokinetics of a Progesterone Ring Versus a Progesterone Vaginal Insert
Pre Term BirthUnlock trial analytics

Study Endpoints

Primary Endpoints

Systemic pharmacokinetics of progesterone, Concentration over 24 hours
14 days

Describe the concentration of progesterone (P4) in blood prior to, during and after 24 hours of DARE-PTB1 IVR (8mg and 12mg) over 14 days of use.

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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
DARE-PTB1 8mg IVREXPERIMENTALIntravaginal ring containing 8mg progesterone administered once for 14 days.
DARE-PTB1 12mg IVREXPERIMENTALIntravaginal ring containing 12mg progesterone administered once for 14 days.
DARE-PTB1 12mg IVR every 3 daysEXPERIMENTALIntravaginal ring containing 12mg progesterone administered every 3 days for 15 days.
Endometrin 100mgACTIVE_COMPARATOR100mg progesterone vaginal insert, three times daily for 14 days.

Interventions

NameTypeDescription
ProgesteroneDRUGEach arm will administer different amounts of progesterone vaginally (8mg to 100mg) over a 14-15 day time period.
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Eligibility Criteria

Age Range40 Years to 65 Years
SexFEMALE
Healthy VolunteersYes

Inclusion Criteria: * Individuals assigned female at birth who are post-menopausal, women 40 to 65 years of age, inclusive. Postmenopausal is defined as 6-months of spontaneous amenorrhea with serum FSH levels \> 40 mIU/mL (if not taking systemic hormone therapy) or 6 weeks postsurgical bilateral o...

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Frequently asked questions about Progesterone

What is Progesterone used for in Pre Term Birth?

Progesterone is being developed by Dare Bioscience, Inc. for the prevention of Pre Term Birth. It is a small molecule drug currently in Phase 1 clinical development. The drug is being studied in a clinical trial to compare the pharmacokinetics of a progesterone ring versus a progesterone vaginal insert in women at risk of preterm birth.

Who makes Progesterone?

Progesterone is being developed by Dare Bioscience, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol DARE. The company is conducting clinical trials to evaluate the drug for the prevention of Pre Term Birth.

What phase is Progesterone in?

Progesterone is in Phase 1 clinical development. It is an investigational drug and has not yet been approved by regulatory authorities. The ongoing Phase 1 trial is designed to compare the pharmacokinetics of a progesterone ring versus a progesterone vaginal insert.

What clinical trials is Progesterone in?

Progesterone is being studied in a Phase 1 clinical trial with the identifier NCT06668896. The trial, titled "Comparing the Pharmacokinetics of a Progesterone Ring Versus a Progesterone Vaginal Insert," is not yet recruiting and plans to enroll 60 female participants aged 40 years and older.

Is Progesterone the same as a progesterone ring or vaginal insert?

Progesterone is the active drug being studied in two different formulations: a progesterone ring and a progesterone vaginal insert. The ongoing Phase 1 trial compares the pharmacokinetics of these two delivery methods to evaluate how the drug is absorbed and processed in the body.