Table 6. The effect of dietary marine derived Ca-Mg complex supplementation to gestating and lactating sows in four successive parities on farrowing and placenta expulsion time duration¹⁾

Items (min)	Parity 1			Parity 2			Parity 3			Parity 4			SEM	p-value
Items (min)	CON²⁾	CM1	CM2	CON	CM1	CM2	CON	CM1	CM2	CON	CM1	CM2	SEM	Parity	Treatment	P × T
Duration between first to last piglet birth	245^a	215^b	217^b	236^a	217^b	216^b	230	221	238	245.6	223.6	231	5.442	NS	***	*
Placenta expulsion time after last piglet birth	83^a	62^b	61^b	84^a	72^b	70^b	85^a	75^b	72^b	85.3^a	74.1^b	68.3^b	3.372	**	***	NS

Values represent the means of 24 sows per treatment.
CON, basal diet; CM1, basal diet – MgO - 0.3% limestone + 0.40% marine derived Ca-Mg complex; CM2, basal diet - MgO - 0.7% limestone + 0.40% marine derived Ca-Mg complex.
Different superscripts within a row indicate a significant difference (p < 0.05) in response to treatment diets CM1 and CM2.
p < 0.05,
p < 0.01,
p <0.0001.
P × T, interactive effects between parity and dietary treatments; NS, non-significant.