The investigators want to describe the endometrial microbiome composition in normal fertile women and women with a history of recurrent pregnancy loss by analyzing mid-luteal phase vaginal swab and endometrial biopsy samples using 16S rRNA sequencing.
The female genital tract microbiome may reflect female reproductive health and may be related to pregnancy outcomes. Disturbances in this microbiome may be associated with adverse reproductive outcomes. The investigators hypothesize that the endometrial and vaginal microbiome composition in women with a history of recurrent pregnancy loss are different, compared with those in normal fertile women.