Skip to main content
OpenTrials
Not Yet Recruiting

NCT Number: NCT07252622

Progesterone Levels and Frozen Embryo Transfer Outcomes

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. 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. 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.

Not Yet Recruiting

Trial opening soon.

Get Notified

Key information

Conditions

IVF

Age range

18 year–50 year

Sex eligibility

Female

Study type

Observational

Who can participate

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 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.
  • 18 years and older

Exclusion criteria

  • 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.

Treatment and study plan

Blood Draw

Other

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

Primary outcomes

  1. Ongoing pregnancy

    Time frame: Through study completion, an average of 1 year

    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).

Study contacts

Contact information is provided by the study sponsor or research team.

David Boedeker

CONTACT

[email protected]

301-545-1423

Sponsors and collaborators

Lead sponsor

Shady Grove Fertility Reproductive Science Center

Other

Registry information

Acronym: PLATO

Important dates

Study start
2025
Primary completion
2028
Study completion
2028
First posted
Nov 28, 2025
Registry last updated
Nov 28, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.