Inclusion Criteria:  Couples that fulfill the following criteria are included (according to the ESHRE Recurrent Pregnancy Loss Guideline 2017):  RPL in the current relationship: defined as the loss of ≥ 2 preceding pregnancies. These pregnancy losses include:  all pregnancy losses before the 24th week of gestation verified by ultrasonography or uterine curettage and histology non-visualized pregnancies (including biochemical pregnancy losses and/or resolved and treated pregnancies of unknown location), verified by positive urine or serum hCG both consecutive and non-consecutive pregnancy losses Dutch or English speaking couple Couples with females aged ≤42 years at intake  Exclusion Criteria:  Mental or legal incapability of either the male or female of the couple Loss of < 2 pregnancies in current relationship