Table 4.

Effects of prenatal¹ and postnatal² maternal protein supplementation on preweaning growth of fall born calves during years 1 to 5³

Trait	Treatment				SEM	P value
	CON-CON4	CON-RES5	RES-CON	RES-RES		Prenatal	Postnatal	Prenatal×Postnatal
Birth Weight, kg	37.7		37.6		0.5	0.87	–	–
BW January, kg	127.8b	125.1b	129.1b	115.0a	2.7	0.10	< 0.01	0.03
ADG, kg/d (Birth to Jan)	0.85b	0.80b	0.84b	0.73a	0.02	0.08	< 0.01	0.12
Weaning Weight6, kg	183.8bc	177.8b	189.4c	163.0a	4.2	0.28	< 0.01	0.02
ADG7, kg/d (January to Weaning)	0.69bc	0.65b	0.72c	0.60a	0.02	0.43	< 0.01	0.03

^a–cMeans within row without a common letter differ (P < 0.05).

¹Prenatal treatment during conception and the first trimester of gestation.

²Postnatal treatment during early to mid-lactation.

³Carcass characteristics were not obtained in year 3.

⁴CON-CON = prenatal control diet and postnatal control diet.

⁵CON-RES = prenatal control diet and postnatal restricted.

⁶Weaning weight was adjusted to 205 d of age.

⁷BW used for ADG calculation was BW taken at weaning.