Table 4.

Carcass traits of heifers in experiment 1¹

	Implant				Days on feed (DOF)					Implant × DOF
Item	SINGLE	REPEATED	SEM2	P-value	172	193	214	SEM2	P-value	P-value
Carcasses, n	1,865	1,857	—	—	1,243	1,242	1,237	—	—	—
HCW, kg	382	384	1.2	0.09	365c	383b	400a	1.5	0.01	0.67
HCW gain, kg3	202	205	1.2	0.06	186c	204b	221a	1.4	0.01	0.47
Dress, %4	64.30	64.46	0.115	0.19	63.86b	64.29ab	64.99a	0.141	0.01	0.83

¹Treatments were: Implanted with either Revalor-XH (80 mg TBA and 8 mg E₂, uncoated; 120 mg TBA and 12 mg E₂, coated; 200 mg TBA and 20 mg E₂, total) on arrival or Revalor-IH (80 mg TBA and 8 mg E₂, uncoated) on arrival followed by Revalor-200 (200 mg TBA and 20 mg E₂, uncoated) at approximately 90 DOF and cattle harvest at 172, 193, or 214 days on feed.

²The SE of the difference between treatment means (SAS Inst., Cary, NC).

³Initial HCW = initial BW × 0.58.

⁴Calculated as (HCW/final BW pencil shrunk 4%).

^a,b,cMeans within row are different (P < 0.05).