Actively Recruiting
Assessing the Convenience of Natural Proliferative Phase Frozen Embryo Transfer
Led by Instituto Valenciano de Infertilidade de Lisboa · Updated on 2026-02-23
530
Participants Needed
1
Research Sites
144 weeks
Total Duration
On this page
Sponsors
I
Instituto Valenciano de Infertilidade de Lisboa
Lead Sponsor
G
Gedeon Richter Ltd.
Collaborating Sponsor
AI-Summary
What this Trial Is About
This study will assess the convenience of the natural proliferative phase frozen embryo transfer (NPP-FET) in terms of number of number of appointments needed before cycle scheduling.
CONDITIONS
Official Title
Assessing the Convenience of Natural Proliferative Phase Frozen Embryo Transfer
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Endometrial thickness 27 7 mm on the day of starting progesterone-based luteal phase support (LPS)
- Serum progesterone levels <1.5 ng/ml on the day of starting progesterone-based LPS
- Luteal phase support with micronized progesterone 400mg twice daily
- Regular menstrual cycles lasting more than 24 days and up to 38 days
- IVF or ICSI treatments using donated oocytes
- Single blastocyst stage embryo transfer
- First or second embryo transfer from the same cohort
You will not qualify if you...
- Use of exogenous ovarian stimulation during frozen embryo transfer
- Untreated hydrosalpinx, polyps, submucous myomas, or severe adenomyosis
- History of three or more previous pregnancy losses
- History of three or more failed embryo transfers with donated oocytes
- Personalized start of exogenous progesterone based on previous endometrial receptivity assay test
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Trial Site Locations
Total: 1 location
1
Instituto Valenciano de Infertilidade
Lisbon, Portugal
Actively Recruiting
Research Team
A
Ana R Neves, MD, PhD
CONTACT
How is the study designed?
Study Type
OBSERVATIONAL
Masking
N/A
Allocation
N/A
Model
N/A
Primary Purpose
N/A
Number of Arms
2
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