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Table 2.

Development of ES-cell derived NT embryos at E7.5 and E8.5

Controls*NT
Two-cell transferred 106 94 
Implantation sites (%) 86 (85) 442 (47) 
Conceptus recovered (% implanted) 65 (79) 177 (40) 
Controls*NT
Two-cell transferred 106 94 
Implantation sites (%) 86 (85) 442 (47) 
Conceptus recovered (% implanted) 65 (79) 177 (40) 
% Embryos% Embryos
E7.5 Pre-streak 24 
 Primitive streak 37 62 
 NP/HF 57 14 
E8.5 Pre-streak 27 
 Primitive streak 14 
 NP/HF 45 
 Somites 92 14 
% Embryos% Embryos
E7.5 Pre-streak 24 
 Primitive streak 37 62 
 NP/HF 57 14 
E8.5 Pre-streak 27 
 Primitive streak 14 
 NP/HF 45 
 Somites 92 14 
*

Embryos fertilised in vivo and cultured 1 day before transfer

Embryos at neural plate or headfold stages [from Downs and Davies(Downs and Davies, 1993)]

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