| Literature DB >> 8122353 |
A C Okkens1, T W Hekerman, J W de Vogel, B van Haaften.
Abstract
The variation in the length of gestation, the period from mating until parturition, was studied in 77 dogs of different breeds; the time for mating was determined by measuring peripheral blood progesterone levels. The mean length of gestation was 62.1 +/- 0.2 (S.E.M.) days, with a variation of 11 days. The number of pups appeared to influence the length of gestation. Length of gestation was negatively correlated (r = -0.96, P < 0.001, n = 44) with litter size in litters with 7 or fewer pups. The intra-breed variation in length of gestation in the five breeds represented by five or more bitches was 3-6 days. The mean gestation of Alsatians (60.1 +/- 0.5, n = 9) was shorter (P < 0.005) than that of the other breeds combined (62.3 +/- 0.3, n = 68). The primiparous/multiparous status of the bitch did not influence the length of gestation.Entities:
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Year: 1993 PMID： 8122353 DOI： 10.1080/01652176.1993.9694397
Source DB: PubMed Journal: Vet Q ISSN： 0165-2176 Impact factor: 3.320