title: Pregnancy attrition associated with pregnancy testing by rectal palpation.
abstract: The objective of this study was to estimate the effect on calving risk of interval from AI date until scheduled date of pregnancy examination. First AI (n = 7105) from 65 dairy herds in the United States and Canada were followed for 294 d to determine whether cows calved. Calving was modeled as a function of the number of days in the interval, herd, season, and breeding at PGF2 alpha-induced estrus by multivariate logistic regression. The main effects of herd and AI following PGF2 alpha-induced estrus were significantly associated with calving rate from first AI. The main effects of interval and season were not significantly associated with calving.
authors: Texas Veterinary Medical Center, Texas A&M University, College Station 77843.
authors: J A
authors: JA
authors: Thompson
authors: W E
authors: WE
authors: Marsh
authors: J A
authors: JA
authors: Calvin
authors: W G
authors: WG
authors: Etherington
authors: H W
authors: HW
authors: Momont
authors: M L
authors: ML
authors: Kinsel
mesh_terms: D000034:Abortion, Veterinary / Q000209:etiology*; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000209:etiology*; D015237:Dinoprost / Q000494:pharmacology; D005260:Female; D010173:Palpation / Q000009:adverse effects / Q000662:veterinary*; D011247:Pregnancy; D011258:Pregnancy Tests / Q000009:adverse effects / Q000662:veterinary*; D012007:Rectum; D015203:Reproducibility of Results; D018570:Risk Assessment; D013997:Time Factors
chemical_list: D015237:Dinoprost