Progesterone Levels and Frozen Embryo Transfer Outcomes

NCT07252622 | Not Yet Recruiting

• 1 other identifier: Pro00089821
• Study Type: observational
• Target: 659
• Locations: 0 countries
• Sites: N/A

Brief Summary

Frozen embryo transfers (FET) now represent the majority of all embryo transfer cycles, and upwards of 60% live births in United States are now attributable to frozen embryo transfers (1). Exogenous progesterone for endometrial decidualization and luteal phase support is thought to be critical to both optimizing endometrial receptivity for implantation as well as sustaining early pregnancy prior to reliable secretory activity of the early placenta. The purpose of this study is to:

1. 1.Determine the prevalence of low serum progesterone levels (less than 10 ng/ml) among patients undergoing a programmed embryo transfer cycle on the day of frozen embryo transfer.
2. 2.Determine if serum progesterone \< 10 ng/ml on the day of frozen embryo transfer is associated with poorer FET outcomes: ongoing pregnancy (primary outcome), live birth, biochemical pregnancy, and clinical pregnancy.

Conditions

IVF

Outcome Measures

Primary Outcomes (1)

• Ongoing pregnancy

  At the completion of the study, a chart review will be performed to determine which patients who participated in this study have an ongoing pregnancy. This information is recorded in our electronic medical record as a binary variable (ongoing pregnancy - yes or no).

  Through study completion, an average of 1 year

Interventions

Blood draw OTHER

All patients will have one additional blood draw on the day of their transfer to measure progesterone level.

Eligibility Criteria

• Age: 18 Years - 50 Years
• Sex: female
• Age Groups: Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

All patients undergoing programmed frozen embryo transfer of a single euploid embryo with combined vaginal progesterone and intramuscular PIO.

You may qualify if:

• Signed informed consent
• Female patient undergoing programmed frozen embryo transfer using exogenous estrogen and progesterone, with exogenous progesterone administered via a combination of vaginal progesterone (Endometrin®) (2-3 times daily) and intermittent progesterone-in-oil (PIO) (every 3rd day) according to standard protocol. Protocols involving other formulations of vaginal progesterone (e.g. Crinone®, Prometrium®, will also be included).
• Planned transfer one 1 euploid embryo. Recruited patients will have at least 1 euploid embryo available for transfer.
• Standard eligibility criteria to undergo frozen embryo transfer at Shady Grove Fertility.
• years and older

You may not qualify if:

• Age less than 18 years or greater than 51 years
• Planned intervention based on serum progesterone concentration measured any time after initiation of intramuscular or vaginal progesterone.
• Uterine cavity abnormality that has not been surgically corrected.
• Any medical or surgical contraindication to undergoing programmed frozen embryo transfer or pregnancy.
• Planned use of embryos cryopreserved by slow-freeze, prior to blastocyst stage, or other than PGT-A normal.
• Currently breast feeding, pregnancy, or having a contraindication to pregnancy.
• Participation in any experimental drug study within 60 days prior to screening.

Sponsors & Collaborators

• Shady Grove Fertility Reproductive Science Center: lead

MeSH Terms

Interventions

Blood Specimen Collection

Intervention Hierarchy (Ancestors)

Specimen Handling; Clinical Laboratory Techniques; Diagnostic Techniques and Procedures; Diagnosis; Punctures; Surgical Procedures, Operative; Investigative Techniques

Central Study Contacts

David Boedeker

CONTACT

301-545-1423; platostudy@sgfertility.com

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Target Duration: 9 Months
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 14, 2025
• First Posted: November 28, 2025
• Study Start: December 1, 2025
• Primary Completion (Estimated): November 1, 2028
• Study Completion (Estimated): November 1, 2028
• Last Updated: November 28, 2025

Record last verified: 2025-11

Data Sharing

• IPD Sharing: Will not share