Adrenal involvement in the biostimulatory effect of bulls

Table 1 Characteristics, and luteal response of cows exposed or not exposed to bulls in Experiment 1.

	Treatments
Variable	BE	NE	SEM^a	P value
n	13	15
Calving date^b	54.69	50.27	15.88	0.47
Days postpartum at start of exposure	56.31	60.67	15.95	0.48
Cow BW (kg)	520.66	519.28	44.24	0.93
Cow BW change (kg)	-3.77	-12.91	14.03	0.10
Calf sex ratio^c	0.62	0.73	0.48	0.52
Interval to resumption of luteal activity during the exposure period, d	3.76	18.2	11.56	< 0.01
% resuming luteal activity during the exposure period	100%	47%		0.01^d

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