It is a case-control study composed of 3 groups : 2 cases groups (RIF and IRPL) already composed as part of a pre-existing research project and 1 control group including patients undergoing ART for male factor infertility. The purpose of this study is to compare the 2 case group with the control group to identify metabolomics signatures.
The investigators have designed a unicentric, case-control, retro- and prospective study to compare the endometrial metabolomics profile in three groups of patients. The two case groups (RIF and IRPL) are already composed and the endometrial and blood samples already taken as part of a pre-existing research project. The current protocol concerns the control group that includes patients undergoing ART for male factor infertility. The study will include three groups. The first group is composed of patients with a history of RIF following IVF-ET. RIF is defined as failure to obtain a clinical pregnancy (fetal cardiac activity at 6-7 weeks gestational age (GA)) following at least 3 different transfers of at least 4 good quality embryos (fresh or frozen). The second group comprises patients with a history of IRPL, defined as three or more consecutive pregnancy losses that occurred before 14 weeks gestational age. Early pregnancy losses diagnosed before ultrasonographic confirmation will be included. The third group will include patients undergoing ART for male factor infertility. The study protocol will be presented and explained to all eligible patients in the control group during the routine consultation before treatment. Patients who agree to participate will contact the department to program the inclusion visit with one of the attending physicians in the department, during which the blood and endometrial samples will be taken. The inclusion visit will take place at the department of reproductive medicine of Angers University Hospital around day 21 of the menstrual cycle (in the middle of the implantation window, which occurs between day 19 and 23 of the cycle, day 1 being the first menstruation day). The metabolomics analysis will be performed according to the same protocol for all samples (study and control groups)
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
OTHER
Masking
NONE
Enrollment
40
collect blood samples and endometrial cells
Angers University hospital
Angers, Maine Et Loire, France
Analyze the endometrial samples with mass spectrometry using the Biocrates kit (measures 188 metabolites)
To compare the metabolomics profile of the endometrium in patients with RIF or IRPL following IVF-ET to patients undergoing Assisted Reproductive Technologies (ART) for male factor infertility to see if there is any significant difference, qualitative or quantitative or both in the metabolites.
Time frame: 1 day
Analyze the blood sample with standard biological examination and the endometrial sample with mass spectrometry using the Biocrates kit
To compare the metabolomics profiles based on endometrial cells to profiles based on blood samples, and to compare the profiles between the 2 groups (RIF and IRPL). If any difference, analyze the mecanisms behind it.
Time frame: 1 day
Analyze the endometrial samples with mass spectrometry using the Biocrates kit
To analyze the endometrial metabolomics profile according to the etiology of infertility in the group of patients with RIF following IVF-ET (endometriosis, low ovarian reserve, polycystic ovarian syndrome…).
Time frame: 1 day
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