Dynamics of Progesterone, TNF-α, and a Metabolite of PGF2α in Blood Plasma of Beef Cows following Embryo Transfer

Table 1

LSMeans and standard errors for concentrations of progesterone (ng/mL) in nonpregnant and pregnant cows within treatments.

Treatment
Day	Control		CIDR^1		GnRH^2		hCG^3
	Nonpregnant	Pregnant	Nonpregnant	Pregnant	Nonpregnant	Pregnant	Nonpregnant	Pregnant
7^4	2.22 ± 0.56^a	2.27 ± 0.49^a	2.54 ± 0.42^a	1.54 ± 0.33^a	2.57 ± 0.44^a,b	1.07 ± 1.66^a	2.67 ± 0.46^a	2.17 ± 0.49^a
14	2.28 ± 0.56^a	3.44 ± 0.49^b	2.31 ± 0.47^a	2.98 ± 0.36^b	3.35 ± 0.44^a	1.16 ± 1.66^a	5.40 ± 0.73^b	4.53 ± 0.78^b
21	0.90 ± 0.56^b,x	2.54 ± 0.49^a,y	0.46 ± 0.33^b,x	1.73 ± 0.25^a,y	1.25 ± 0.47^b,x	0.85 ± 1.66^a,x	2.94 ± 0.94^a,x	2.11 ± 0.95^a,x

Means within the same column lacking a common superscript are significantly different ().
^x,yMeans within row and within treatment group lacking a common superscript are significantly different ().
¹Controlled internal drug release.
²Gonadotropin releasing hormone.
³Human chorionic gonadotropin.
⁴Day of embryo transfer.