Table 1 Cortisol concentration of the milk (pg/mL)

	Cortisol concentration (pg/mL)
	Day-time milking	Night-time milking
Summer solstice(n=5)	0.115±0.012	0.056±0.013
	0.060±0.008	0.047±0.012
	0.076±0.010	0.301±0.022
	0.106±0.005	0.080±0.008
	0.068±0.004	0.052±0.015
Winter solstice(n=5)	0.056±0.009	0.116±0.003
	0.044±0.004	0.048±0.011
	0.028±0.003	0.043±0.003
	0.060±0.012	0.038±0.006
	0.059±0.003	0.100±0.013