Table 1 Rederivation efficiency using frozen and fresh B6SPRTF1 embryos

From: Naturally sterile Mus spretus hybrids are suitable for the generation of pseudopregnant embryo transfer recipients

Facility

Frozen embryos

Fresh embryos prepared from IVF

Embryos transferred (N)

Pups born (N)

Birth rate (%)

Embryos transferred (N)

Pups born (N)

Birth rate (%)

UoO

220

40

18.8

98

33

33.7**

MLC

127

9

7.1

135

20

14.8*

UoM

131

14

10.6

–

–

–

  1. **Chi square of 8.4; d.f. of 1; P = 0.004. *Chi square of 3.9; d.f. of 1; P = 0.048.
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