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First in Human Safety and Ease of Use Assessment of 400mg Progesterone Callavid in Women With Luteal Phase Insufficiency

First in Human Safety and Ease of Use Assessment of 400mg Progesterone Callavid in Women With Luteal Phase Insufficiency

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07136922
Acronym
FREEDOM
Enrollment
20
Registered
2025-08-22
Start date
2026-04-20
Completion date
2027-03-01
Last updated
2026-09-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Luteal Phase Insuffiency, Progesterone Delivery

Keywords

progesterone delivery, progesterone, vaginal drug delivery, callavid, cyclogest, women's health

Brief summary

The aim of this clinical trial is to assess safety of a new vaginal 400mg progesterone drug-device combination product in a first in human trial. Additionally, it aims to assess user acceptability and ability to deliver progesterone. This Phase I trial is a randomised open-label first-in-human crossover trial, recruiting participants who are non-pregnant with luteal phase insufficiency. The main questions it aims to answer are: 1. What are the safety and tolerability profiles of the two progesterone formulations (400mg Progesterone Callavid vs. Cyclogest 400 mg), including the incidence of adverse events (if any) such as allergic reactions, gastrointestinal symptoms (e.g. bloating, constipation), and neurological effects (e.g. headache, drowsiness, euphoria)? 2. What is usability experience for patients using the Callavid drug-device combination compared to pessaries / suppositories (i.e. Cyclogest 400 mg)? 3. How do serum progesterone levels vary within participants when using 400 mg progesterone delivered via the Callavid drug-device combination compared to Cyclogest 400 mg, and what are the implications of this variability for dose-response relationships and future trial design?

Interventions

COMBINATION_PRODUCT400mg progesterone Callavid - 2hr wear

400mg progesterone Callavid, 2 hour wear, twice daily for 7 days

DRUGCyclogest 400 mg

Cyclogest 400 mg pessary, twice daily for 7 days

COMBINATION_PRODUCT400mg progesterone Callavid - 3hr wear

400mg progesterone Callavid, 3 hour wear, twice daily for 7 days

Sponsors

Calla Lily Clinical Care Ltd
Lead SponsorINDUSTRY
University Hospitals Coventry and Warwickshire NHS Trust
CollaboratorOTHER
University of Warwick
CollaboratorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

The trial consists of three rounds, conducted over three consecutive menstrual cycles. Participants are randomised to receive either Cyclogest 400mg progesterone pessary in the first round, crossing over to 400mg progesterone Callavid (administered for 2 hours) in the second round, or 400mg progesterone Callavid (administered for 2 hours) in the first round crossing over to Cyclogest 400mg progesterone pessary in the second round. The third round is to investigate the safety of 400mg progesterone Callavid when administered for 3 hours. This would inform us on the safety of the additional hour of wear time. Each arm will complete the third round following the first two crossover rounds.

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 45 Years
Healthy volunteers
No

Inclusion criteria

* Female sex * Clinical diagnosis of luteal phase insufficiency on the basis of one of the following: * Spotting before first day of heavy menstrual bleeding * Short time between ovulation and menstruation * Symptoms of progesterone insufficiency * Aged 18 - 45 years * Experienced at least one previous miscarriage

Exclusion criteria

* Positive pregnancy test * Currently breastfeeding * Allergies or contraindications to excipients / progesterone pessaries * Current or history of previous condition where hormone treatments are contraindicated e.g. breast cancer * Individuals who lack capacity to consent to the trial * Individuals who have an inability to comply with the trial procedures (e.g. cannot attend hospital for trial visits) * Inability to understand English

Design outcomes

Primary

MeasureTime frameDescription
Adverse events recorded from 400 mg progesterone CallavidFrom treatment up to 24 hours after the last doseAny grade of adverse events, specifically allergy, gastrointestinal (bloating, constipation), neurological (headache, drowsiness, euphoria) according to Common Terminology Criteria for Adverse Events (CTCAE).

Secondary

MeasureTime frameDescription
PROMIS Anxiety questionnaireDay 1 and day 7 of treatment in each round (3 rounds total)PROMIS short 4-item anxiety fear instrument
Acceptability questionnairesDay 1 and day 7 of treatment in each round (3 rounds total)User acceptability questionnaires on 400mg progesterone Callavid
Semi-structured user experience interviewsday 7Semi-structured interviews with participants after completion of the crossover rounds.
Delivery of vaginal progesterone into the blood at 2 hour and 3 hour wearMultiple time points on Day 1 and Day 7 of each treatmentThe serum progesterone levels at time 0, 3- and 6-hour after the first dose on day 1 and the thirteenth dose which is on day 7 each round of treatment are measured. Progesterone levels are measured for both 400 mg progesterone Callavid and 400 mg Cyclogest.

Countries

United Kingdom

Contacts

CONTACTSiobhan Quenby
s.quenby@warwick.ac.uk+442476964000

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 11, 2026