Mean plasma norepinephrine and epinephrine levels during development
% Incubation
.
Norepinephrine (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)
% Incubation
.
Norepinephrine (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