Table 2.

Incidence of pregnancy-associated VTE with inherited thrombophilia.

Thrombophilia	Pregnancy (%/pregnancy)	Overall (%/year)
Factor V Leiden heterozygous	2.1 (0.7–4.9)	0.5 (0.1–1.3)
Prothrombin gene mutation heterozygous	2.3 (0.8–5.3)	0.4 (0.1–1.1)
ATIII, protein C, or protein S deficiency	4.1 (1.7–8.3)	1.5 (0.7–2.8)