Table 2.

Results of embryo transfer with unwashed and washed two-cell embryos following exposure of fertilized embryos to MMVp for 16 h and seroconversion of recipients and progeny.

Virus concentration for incubation of embryos (TCID50/ml)	Embryo transfer with unwashed embryos								Embryo transfer with washed embryos
	Total no. of pups born (no. of litters)	Seropositive mice days post embryo transfer*							Total no. of pups born (no. of litters)	Seropositive mice days post embryo transfer*
		14	21	28	42	42	63	63		14	21	28	42	42	63	63
		R	R	R	R	P	R	P		R	R	R	R	P	R	P
106	0 (0)†	3	3	3	3	NA	3	NA	0 (0)†	3	3	3	3	NA	3	NA
105	8 (2)†	2	3	3	3	8	3	0	2 (1)†	2	3	3	3	2	3	0
104	2 (1)‡	3	3	3	3	0	3	0	7 (1)‡	1	1	1	1	0	1	0
103	18 (2)†	0	0	0	1	0	1	0	14 (2)†	0	0	0	0	0	0	0
102	1 (1)†	0	0	0	0	0	0	0	24 (3)†	0	0	0	0	0	0	0
101	21 (2)†	0	0	0	0	0	0	0	25 (3)†	0	0	0	0	0	0	0
Control (KSOM)	33 (3)†	0	0	0	0	0	0	0	16 (2)†	0	0	0	0	0	0	0

^*R, Recipients; P, progeny; NA, not available.

^†Three recipients were used.

^‡Four recipients were used.