Table 2.

Comparison of characteristics of blood in sexually immature females (pullets) and laying chickens (Gallus gallus).

Parameter	Mean ± (n = studies) SEM
	Sexually immature females (pullets)	Mature laying hens
Hematocrit/PCV %	28.1 ± (4) 1.78A	27.1 ± (10) 0.86A
Hemoglobin %	8.88 ± (2) 0.38A	9.18 ± (5) 0.62A
Plasma protein g dL−1	3.80 ± (2) 1.0B	4.53 ± (3) 0.52B
Albumin g dL−1	1.67 ± (5) 0.098C	1.19 ± (5) 0.18C*
IgY g dL−1	0.948 (1)C	3.66 ± (3) 1.47C
IgA g dL−1	0.342C	0.323C
IgM g dL−1	NA	1.32 ± (2) 0.40C
Vitellogenin g dL−1	0D	1.63D
Triglyceride g dL−1	0.408 ± (3) 0.063E	2.268 ± (5) 0.516E*
Cholesterol g dL−1	0.101 ± (3) 0.0023E	0.172 ± (5) 0.064E
Phospholipids g dL−1	0.141 ± (3) 0.040F	0.453 ± (3) 0.247F

^*Difference with sexually immature female chickens p < 0.05.

^AFor data from different studies see Supplementary Tables 2, 3.

^BSturkie and Newman (1951); Morgan (1975); Yuan et al. (2016); and Rezende et al. (2017).

^CFor data from different studies, See Supplementary Table 5.

^DRedshaw and Follett (1976).

^ENeill et al. (1977); Hagan et al. (1984); Lien et al. (2001); Peebles et al. (2004); and Lv et al. (2018).

^FNeill et al. (1977) and Hagan et al. (1984).

NA, not available.