Table 2.

Relative risk for relative fetal loss associated with hereditary thrombophilic defects according to a meta-analysis by Rey et al. (2003)

Thrombophilic defect	Recurrent pregnancy loss before 13 weeks	Non-recurrent pregnancy loss	Non-recurrent pregnancy loss after 19 weeks
Antithrombin deficiency	0.88	1.54	Not analyzed
Protein C deficiency	1.57	1.41	Not analyzed
Protein S deficiency	14.72	7.39	Not analyzed
Factor V Leiden	2.01	1.73	3.26
Prothrombin G20210A	2.05	2.32	2.30