. 2017 Sep 18;31(6):820–826. doi: 10.5713/ajas.17.0301

Table 5.

Statistics of artificial insemination in Holstein cows with different parities

Variables	Parity 1		Parity 2		Parity 3		Parity 4		Parity 5		Parity 6		Parity 7		Parity 8

	P (n)	N (n)	P (n)	N (n)	P (n)	N (n)	P (n)	N (n)	P (n)	N (n)	P (n)	N (n)	P (n)	N (n)	P (n)	N (n)
2001	1	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0
2002	1	0	0	0	1	1	0	0	0	0	0	0	0	0	0	0
2003	0	0	1	2	1	0	1	1	0	0	0	0	0	0	0	0
2004	2	2	0	0	1	2	1	4	1	0	0	0	0	0	0	0
2005	5	1	3	2	0	0	1	1	1	1	1	0	0	0	0	0
2006	5	5	5	4	1	2	0	0	0	2	1	1	0	0	0	0
2007	6	8	4	4	6	4	0	0	1	0	2	1	1	0	0	0
2008	11	5	5	9	3	5	3	9	0	0	1	0	0	1	0	2
2009	18	11	8	18	4	15	4	17	3	4	0	0	2	2	1	1
2010	12	5	9	9	6	9	5	5	2	9	2	0	0	0	1	2
2011	15	10	8	8	12	16	4	11	4	7	1	2	3	0	0	3
2012	14	11	8	8	7	7	9	9	2	5	1	2	1	2	1	0
2013	15	7	6	8	3	5	6	11	4	4	0	0	0	2	1	3
Number of cows with pregnancy	105		58		45		34		18		9		7		4
Number of services per conception	1.75±0.11^a		2.31±0.22^a,b		2.53±0.24^b		2.38±0.13^a,b		2.39±0.42^a,b		1.56±0.29^a		1.57±0.30^a		2.75±0.63^b
CR (%)	57.14^a,b		43.29^a		39.53^a		40.02^a		41.84^a		64.10^b		64.10^b		36.36^a

P, pregnancy; N, non-pregnancy; n, number of cows; CR, conception rate (pregnancy per artificial insemination service).

^a,b

Means with different superscripts in the same row differ at p<0.05.