Adrenal involvement in the biostimulatory effect of bulls

Table 2 Characteristics, and luteal response of cows exposed to bull or steer urine in Experiment 2.

	Treatments
Variable	BUE	SUE	SEM^a	P value
n	19	19
Calving date^b	39	39	9.22	0.98
Cow BW (kg)	557	550	40.90	0.59
Cow BW change (kg)^c	-37.20	-22.30	21.50	0.22
Calf BW (kg)	35	39	9.10	0.92
BCS	5.10	5.20	0.34	0.60
BCS change^c	-0.04	-0.04	0.35	0.98
Calf sex ratio^d	0.47	0.60	0.51	0.44
Dystocia score^e	1.00	1.05	0.16	0.34
Interval to resumption of luteal activity during the exposure period, d	62.50	55.80	14.60	0.17
% resuming luteal activity during the exposure period	15%	33%		0.25^f

^aSEM = Pooled standard error for means.
^bDay of year.
^cCow BW and BCS change are differences from the start of treatment to the end of treatment.
^dCalf sex ratio = ratio of male to female calves, 1 = male and 0 = female.
^eDystocia Score: 0 = No assistance to 5 = Caesarean section.
^fX² = 1.3, d.f. = 1. Table legend text.

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