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Optimization of Frozen Embryo Transfers by Studying Progesterone on the Day of Transfer

NCT04290520 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 115

Last updated 2023-06-06

No results posted yet for this study

Summary

The number of embryo transfers after freezing has increased over the last 10 years due to improvements in embryo freezing techniques and in particular the development of vitrification. This has also been made possible by changes in clinical protocols favouring freezing in patients at high risk of hyperstimulation and by different methods of endometrial preparation to receive embryos after rewarming.

In fact, embryo transfer requires endometrial preparation to make implantation possible. There are various protocols for endometrial preparation. Endometrial preparations in the natural cycle, with or without induction of ovulation by FSH, require more regular monitoring, and allow the development of a main follicle that will give a corpus luteum that will secrete progesterone in the luteal phase, which can be supported by the supply of exogenous progesterone. In contrast, endometrial preparations in hormone replacement therapy (HRT) cycles are done by administering estradiol orally or transdermally to stimulate endometrial growth while blocking the patient's gonadotropic axis, and administering progesterone in the luteal phase to differentiate the endometrium. This preparation has the advantage of being simpler to monitor and organize.

There is currently no consensus on a type of preparation that would give better results, and although the literature seems to show that there would be more miscarriages in a substituted cycle, there does not seem to be any difference in the birth rate per cycle in the end, whatever the type of endometrial preparation.

Some teams have shown that in HRT, there appears to be more miscarriage when the progesterone level measured on the day of the frozen embryo transfer is lower, especially below a threshold of 9ng/mL. Labarta showed ESHRE in July 2019 that modifying the endometrial preparation if the progesterone level is below 9ng/mL on the day of transfer by adding subcutaneous progesterone (Progiron) resulted in a lower miscarriage rate, comparable to the usual miscarriage rates in spontaneous pregnancy.

Thus, if the miscarriage rate is higher in HRT than in the natural cycle, and if this is related to "luteal insufficiency" characterized by a lower circulating serum progesterone level, the hypothesis of this study in the investigator's population would be that the serum progesterone level on the day of the frozen embryo transfer would be lower in HRT than in the spontaneous cycle.

Conditions

Interventions

OTHER

bioassay

Serum progesterone level (ng/ml)

Sponsors & Collaborators

  • Centre Hospitalier Universitaire de Nīmes

    lead OTHER

Eligibility

Min Age
18 Years
Max Age
42 Years
Sex
FEMALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2020-03-01
Primary Completion
2020-12-31
Completion
2020-12-31

Countries

  • France

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04290520 on ClinicalTrials.gov