Factors affecting gestation length in the Thoroughbred mare

Mina Clare Gwynne Davies-Morel, John R. Newcombe, S. J. Holland

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In order to assist in the accurate prediction of the timing of parturition in the mare true gestation length, along with the potential effect of a number of factors, was investigated. Data from 433 Thoroughbred foal pregnancies were used. Sequential ultrasonic scanning allowed the true gestation length (fertilisation-parturition) to be ascertained, as apposed to previous work, which used the mating-parturition interval. An average gestation length of 344.1±0.49 days was evident. Colt foal pregnancies were significantly (P
Original languageEnglish
Pages (from-to)175-185
Number of pages11
JournalAnimal Reproduction Science
Issue number3-4
Publication statusPublished - 16 Dec 2002


  • gestation length
  • mare age
  • foals
  • month of year
  • ovulation-mating interval


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