Pregnancy success of lactating Holstein cows after a single administration of a sustained-release formulation of recombinant bovine somatotropin

Table 3 Effect of bovine somatotropin administered 3 days before insemination on the proportion of cows pregnant after first service (Experiment 2).^a

	Treatment^b
	Control	bST	p	AOR	CI
All cows	22/124 (17.8%)	32/132 (24.2%)	NS	1.50	0.81 to 2.76
Successfully synchronized cows ^c	19/85 (22.4%)	26/105 (24.8%)	NS	1.12	0.51 to 2.20

^a Abbreviations are bST; bovine somatotropin; AOR, adjusted odds ratio; CI, confidence interval; NS, non-significant
^b Data are the number of cows pregnant/total cows inseminated and, in parentheses, percent pregnant.
^cCows where progesterone concentration on the day of timed artificial insemination (Day 0) was < 1 ng/ml and progesterone concentration on Day 7 after TAI was ≥ 1 ng/ml.

ISSN: 1746-6148