Table 1.

Progeny from the mating of Cf2^+/− mice

Day of gestation	Total embryos	Prothrombin genotype
		+/+	+/−	−/−
8.5	60	14	38	8 (13%)
9.5	129	24	88	17 (13%)
10.5	51	12	38	1 (2%)
11.5	51	10	34	7 (14%)
12.5	100	31	52	17 (17%)
13.5	44	8	31	5 (11%)
14.5	33	9	20	4 (12%)
15.5	74	24	49	1 (1.4%)
16.5	68	16	49	3 (4.4%)
18.5	40	12	26	2 (5%)
Total	650	160	425	65 (10%)