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Clinical Cohort Study on the Endocrinology and Vaginal/Endometrial Microbiome of the Luteal Phase in Assisted Reproduction

NCT03507673 · Status: RECRUITING · Type: OBSERVATIONAL · Enrollment: 1200

Last updated 2025-05-22

No results posted yet for this study

Summary

Rationale:

The hormone progesterone has different functions. In pregnancy, it is vital for maintenance thereof. In early pregnancy, progesterone is synthesized by the Corpus luteum (CL). Its production shifts from the CL to the placenta after several gestational weeks. This process is termed luteoplacental shift. Still, the exact time point of the luteoplacental shift remains unknown. Furthermore, the characteristics of placental progesterone increase and its relevance for the course of pregnancy has not been studied so far.

Furthermore, recent studies have shown an influence of abnormal vaginal microbiota on the likelihood to achieve and maintain pregnancy. Little is known about possible crosslinks between endocrinology and vaginal/endometrial microbiota which is why this study aims to investigate possible associations of such kind.

Objective:

The primary objective of this study is to evaluate the time point of the luteoplacental shift in patients achieving pregnancy after transfer of cryopreserved embryos subsequently to IVF/ICSI cycles. Secondary objectives are to study the characteristics of the placental progesterone increase and its function as a predictor of the course and development of pregnancies and to study vaginal/endometrial microbiota at baseline and changes associated with shift into luteal phase and early pregnancy and how this potentially relates to pregnancy outcome.

Study Design:

Prospective, multi-center, observational clinical cohort study. For the primary objective, data from a single center will be also be retrospectively analyzed.

Study population:

Female patients aged 18 to 45 years undergoing transfer of embryos after freezing and thawing 2PN oocytes or embryos.

Interventions: Blood withdrawal, vaginal/endometrial swabs and endocrine and microbiom analyses.

Study parameters/endpoints:

The main parameter is time point of progesterone increase in pregnancy in relation to initial progesterone levels by pregnancy status. Secondary, slope and magnitude of placental progesterone increase and its relevance as a predictor for the course and development of pregnancies/babies. Furthermore, vaginal microbiota of women undergoing embryo transfer and of women in early pregnancy are parameter of this study.

Conditions

Interventions

DIAGNOSTIC_TEST

Blood samples and microbiological swaps

Blood analysis and analysis of vaginal microbiota.

Sponsors & Collaborators

  • University of Luebeck

    lead OTHER

Principal Investigators

  • Georg Griesinger, MD · Sektion für gynäkologische Endokrinologie und Reproduktionsmedizin

Eligibility

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

Timeline & Regulatory

Start
2018-05-02
Primary Completion
2027-08-31
Completion
2028-06-30

Countries

  • Germany

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 NCT03507673 on ClinicalTrials.gov