NCT04820985

Analysis of the Composition of the Vaginal Microbiota During IVF Treatment and Correlation With Serum Progesterone Level on the Day of Embryo Transfer

Analyse de la Composition du Microbiote Vaginal à différents Temps de la Prise en Charge en FIV et corrélation Avec le Taux de progestérone sérique le Jour du Transfert d'Embryon

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 60 (actual)
• Sponsor: Centre Hospitalier Universitaire de Nīmes · Academic / Other
• Sex: Female
• Age: 18 Years – 40 Years
• Healthy volunteers: —

Summary

The composition of the vaginal microbiota varies throughout a woman's life and is sensitive to hormonal and environmental factors. Specifically, hormonal treatments necessary in the medically assisted procreation (MAP) processes can influence the vaginal microbiota. New sequencing techniques have been used to characterize the vaginal microbiota, demonstrating that the microbiota could be divided into 5 classes. The composition of the vaginal microbiota seems to have an implication in the evolution of a pregnancy after IVF. It is therefore essential to have more data on the evolution of the vaginal microbiota at the different stages of IVF treatment and to analyze whether this evolution can be predictive of the success of embryo implantation. Good endometrial progesterone impregnation is an essential prerequisite for ensuring embryo implantation. Indeed, supporting the luteal phase through vaginal progesterone is an essential step in IVF protocols to ensure synchronization between endometrial maturation and embryonic age. However, the serum progesterone level on the day of embryo transfer varies widely between patients. Several factors such as age, vaginal mucosa trophicity, estrogen impregnation and sexual activity are known to affect the vaginal absorption of progesterone. The treatments and vaginal examinations performed during the IVF procedure could also have an impact on the constitution of the vaginal microbiota. The hypothesis of this research is that there is an alteration in the vaginal microbiota during the IVF process which may alter the absorption of vaginal progesterone, with an impact on the failure or success of embryo implantation.

Conditions

• IVF

Interventions

Type	Name	Description
OTHER	Vaginal swab	Vaginal flora swab 3 months before stimulation, at oocyte puncture, embryo transfer and beta-human chorionic gonadotropin dosing
OTHER	Blood test	Blood sample to measure plasma dose of progesterone

Timeline

• Start date: 2021-05-26
• Primary completion: 2023-01-11
• Completion: 2024-04-22
• First posted: 2021-03-29
• Last updated: 2024-04-26

Locations

1 site across 1 country: France