The differences of gonadal hormones and uterine transcriptome during shell calcification of hens laying hard or weak-shelled eggs

Table 2 The concentrations of gonadal hormones and calcium in serum from LS and HS¹

Parameters	Period	LS	HS
P₄, pmol/L	Initiation	752.55 ± 118.09	1401.63 ± 155.53^*
	Growth	656.33 ± 100.56	605.23 ± 80.16
	Termination	751.30 ± 134.07	616.66 ± 93.66
E₂, pg/mL	Initiation	251.17 ± 39.43	296.61 ± 59.70
	Growth	243.41 ± 39.72	166.82 ± 24.02
	Termination	335.46 ± 58.20	221.92 ± 28.17
1,25-(OH)₂D₃, ng/mL	Initiation	22.90 ± 4.13	40.22 ± 6.89^*
	Growth	21.59 ± 3.78	19.20 ± 3.22
	Termination	24.26 ± 5.22	19.79 ± 3.77
Ca, μg/mL	Initiation	335.58 ± 9.74	261.29 ± 15.42^*
	Growth	201.67 ± 17.64	196.81 ± 9.67
	Termination	266.98 ± 17.37	239.03 ± 10.41

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