The goal of this clinical non-invasive observational pilot study is to improve the prediction of pregnancy success after In Vitro Fertilisation (IVF)/IVF -Intracytoplasmic Sperm Injection (ICSI) treatment by examining the vaginal microbiome and the immunological profile of menstrual blood in women (18-42) years old) undergoing their first IVF/IVF/ICSI treatment. The main questions it aims to answer are: What is the ReceptIVFity profile (low, medium, or high) of the vaginal microbiome in these women? How do the endometrial-derived lymphocytes respond to different immune stimuli and microbiota? Can the endometrial stromal cells decidualize effectively in the presence or absence of specific microbiota? Participants will: Self-perform a vaginal swab to determine the ReceptIVFity profile of their vaginal microbiome. Self-collect menstrual blood during 24 hours in 2 blocks of 12 hours for immunological analysis.
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Immune Cell Phenotype and Function in Menstrual Blood Stratified by Vaginal Microbiome in IVF Patients
Timeframe: Baseline and 3 months
Genotyping of Maternal KIR and HLA-C
Timeframe: Baseline
RNA Analysis of Stromal Fibroblast Cells
Timeframe: Baseline