This cross-sectional and prospective cohort study will investigate if sRPL patients with a first born boy who carry ≥1 HY-restricting (HY-r) HLA class II alleles are associated with a lower chance for a succesful reproductive outcome in first pregnancy after admission compared to sRPL patients with a first born girl carrying ≥1 HY-r HLA class II alleles and women with no HY-r HLA class II alleles and a firstborn boy. Also, the study will compare sRPL patients with a firstborn boy who do not carry a HY-r HLA class II allele with sRPL patients having a firstborn girl and carrying no such alleles. We hypothesize that sRPL patients with a first born boy compared to sRPL patients with a firstborn girl who carry ≥1 HY-r HLA class II alleles is associated with a negative prognosis, while no association between sex of firstborn child and pregnancy outcome is expected in sRPL carrying no HY-r HLA class II alleles. Neither do we expect an association between pregnancy outcome and carriage of HY-r HLA class II alleles in pRPL patients.
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Live birth or prolonged pregnancy in patients with ≥1 HY restricted HLA class II allele
Timeframe: Through study completion, i.e. up to 5 years
Live birth or prolonged pregnancy in patients with 0 HY-restricted HLA class II allele
Timeframe: Through study completion, i.e. up to 5 years