Table 4.

Effect of CP levels in gestation diets on blood profiles of gilts in gestation¹

Item	Protein level in gestation (%)				SEM2	p-value
	11.44	12.93	15.04	17.13		Linear	Quadratic
Plasma urea nitrogen (g/dL)3,4
At mating5	10.9	10.9	10.9	10.9	-	-	-
15 d	9.2	10.3	12.2	15.1	0.71	<0.001	0.225
35 d	8.6	10.2	12.0	16.0	0.76	<0.001	0.130
70 d	7.0	9.8	11.8	15.6	0.68	<0.001	0.447
90 d	6.2	7.7	10.1	13.1	0.42	<0.001	0.113
110 d	8.2	7.8	10.0	11.0	1.02	0.031	0.510
Plasma free fatty acids (μEq/L)3
At mating	69.6	69.6	69.6	69.6	-	-	-
15 d	33.4	42.4	45.8	29.0	4.10	0.600	0.006
35 d	29.6	31.8	33.2	26.0	3.16	0.515	0.156
70 d	29.4	34.4	36.8	27.4	3.56	0.824	0.061
90 d	32.2	26.8	68.2	34.2	6.26	0.110	0.037
110 d	108.0	127.4	132.6	85.5	6.06	0.356	0.794
Plasma glucose (mg/dL)3
At mating	73.0	73.0	73.0	73.0	-	-	-
15 d	61.0	68.4	68.2	63.2	2.92	0.631	0.050
35 d	63.4	70.6	67.6	58.4	4.84	0.418	0.110
70 d	70.2	64.4	54.2	65.6	4.19	0.218	0.057
90 d	67.0	61.6	69.4	64.6	3.52	0.970	0.933
110 d	78.4	77.6	73.2	76.4	6.06	0.706	0.746

¹Least squares means of 5 observations per treatment.

²Standard error of mean.

³Day effect (p<0.01; repeated measures ANOVA).

⁴Day×treatment interaction (p<0.05; repeated measures ANOVA).

⁵Blood samples (n = 11) were randomly taken from gilts immediately before mating.