Beni-Suef University Journal of Basic and Applied Sciences

Table 2 Distribution and descriptive statistics of the cows included in this study

From: Fertility response of lactating dairy cows subjected to three different breeding programs under subtropical conditions

Item		Breed						Total
		Holstein			Simmental			Total
		AI (n)	Preg. (n)	PR (%)	AI. (n)	Preg. (n)	PR (%)	AI. (n)	Preg. (n)	PR (%)
Season	Cold	914	342	37.42 ± 1.60	181	91	50.28 ± 3.73	1095	433	39.54 ± 1.48
	Hot	358	103	28.77 ± 2.39	67	21	31.34 ± 5.71	425	124	29.18 ± 2.20
	Total	1272	445	34.98 ± 1.38	248	112	45.16 ± 3.17	1520	557	36.64 ± 1.24
Breeding protocol	PO	394	134	34.01 ± 2.39	87	42	48.28 ± 5.39	481	176	36.59 ± 2.20
	G6G	567	196	34.57 ± 1.20	98	48	48.98 ± 5.07	665	244	36.69 ± 1.87
	CIDR	311	115	36.98 ± 2.74	63	22	34.92 ± 6.05	374	137	36.63 ± 2.49
	Total	1272	445	34.98 ± 1.38	248	112	45.16 ± 3.17	1520	557	36.64 ± 1.24

AI artificial insemination, Preg. pregnant, PR pregnancy rate, PO Presynch-Ovsynch protocol, CIDR controlled internal drug release, G6G gonadotropin of Presynch, 6 days later gonadotropin of Ovsynch

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