Table 2. Coefficient of correlation between UV blood glucose and amino acid concentrations, total milk production during pregnancy, and placental development in the PP and MP groups.

Variable		Cotyledonary weight					Cotyledonary surface area
		Total (g)	First stage (%)	Second stage (%)	Third stage (%)	Fourth stage (%)	Total (cm2)	First stage (%)	Second stage (%)	Third stage (%)	Fourth stage (%)
PP group 1
	Glucose (mg/dl)	0.766 **	−0.300	−0.239	0.364	0.375	0.706 **	−0.301	−0.545 *	0.438	0.474
	TAA (µmol/l)	0.487	0.244	−0.464	−0.074	0.004	0.508	0.189	−0.165	−0.055	−0.067
	TEAA (µmol/l)	0.554 *	0.106	−0.441	0.068	0.097	0.553 *	0.023	−0.234	0.111	0.067
	TNEAA (µmol/l)	0.444	0.301	−0.464	−0.138	−0.039	0.474	0.261	−0.129	−0.130	−0.127
MP group 2
	Glucose (mg/dl)	0.414	−0.116	−0.030	0.043	0.200	0.344	−0.150	−0.144	0.108	0.273
	TAA (µmol/l)	0.011	0.038	−0.265	0.093	0.210	0.251	0.138	−0.523 *	0.118	0.081
	TEAA (µmol/l)	0.030	0.049	−0.398	0.163	0.133	0.044	0.036	−0.503 *	0.187	0.210
	TNEAA (µmol/l)	0.350 e-3	0.026	−0.156	0.043	0.060	0.296	0.164	−0.445	0.065	0.005
Total milk production during pregnancy (kg)		0.010	0.471 *	−0.532 *	−0.302	−0.120	−0.179	0.398	−0.464 *	−0.322	−0.027

^* P < 0.05; ^** P < 0.01. ¹ n = 15. ² n = 19. MP, multiparous; PP, primiparous. TAA, total amino acid; TEAA, total essential amino acid; TNEAA, total non-essential amino acid; UV, umbilical vein.