Table 1.

The effect of oregano on stillbirth and liveborn litter size in a large pig breeding unit

	Oregano treated sows (n = 900)	Non treated sows (n = 899)	P-value
Stillbirth (number of piglets, s)	0.808, s = 0.01	0.907, s = 0.01	0.05
Liveborn litter size (number of piglets, s)	10.09, s = 1.01	9.84, s = 0.02	0.05

s — standard deviation