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Table 2.

Mean plasma norepinephrine and epinephrine levels during development

% IncubationNorepinephrine (ng ml-1)Epinephrine (ng ml-1)
60 15±6 (3) 14±7 (3) 
70 27±6 (5) 13±8 (5) 
80 64±17 (5)* 21±11 (5) 
90 80±21 (5)* 53±24 (5) 
% IncubationNorepinephrine (ng ml-1)Epinephrine (ng ml-1)
60 15±6 (3) 14±7 (3) 
70 27±6 (5) 13±8 (5) 
80 64±17 (5)* 21±11 (5) 
90 80±21 (5)* 53±24 (5) 

An asterisk indicates significant differences (P<0.05) from adjacent periods without asterisks. Due to limited sample size, statistics on catecholamines were omitted for 60% of incubation. All measures are presented as means ± S.E.M. for each percentage of incubation studied. The number of embryos is presented in parentheses

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