Table 2. The effect of feeding frequency during gestation on body weight, backfat thickness, average daily feed intake and weaning to estrus interval in lactating sows

Criteria	Treatment		SEM	p-value
	OF	TF
No. sows	10	10	-	-
Body weight (kg)
12 h postpartum	220.2	215.3	2.66	0.191
d 21 of lactation	219.5	217.9	3.00	0.735
Body weight gain (kg)
d 0–21	−0.7	2.6	1.24	0.309
Back-fat thickness (mm)
12h postpartum	20.2	22.3	1.07	0.246
d 21	17.5	18.8	0.92	0.486
Back-fat changes (mm)
d 0–21	−2.7	−3.6	0.65	0.640
Average daily feed intake (kg/d)
d 0–7	5.98	5.81	0.120	0.588
d 8–14	6.76	6.88	0.157	0.706
d 15–21	7.01	6.75	0.175	0.413
Overall	6.58	6.48	0.098	0.556
Weaning to estrus interval (day)	4.5	4.8	0.28	0.213

OF, once daily feeding; TF, twice daily feeding.