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Cryptorchidism in North Ronaldsay sheep
  1. K. C. Smith, BVSc, MSc, PhD, DSHP, FRCVS1,
  2. P. J. Brown, BVMS, PhD, MRCVS, MRCPath, DipECVPath1,
  3. J. Morris, PhD2 and
  4. T. J. Parkinson, BVSc, PhD, DBR, FRCVS3
  1. 1 School of Clinical Veterinary Science, University of Bristol, Langford House, Langford, Bristol BS40 7DU
  2. 2 Howar, North Ronaldsay, Orkney KW17 2BE
  3. 3 Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11-222, Palmerston North, New Zealand
  1. Dr Brown whose present address is School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Leicestershire LE12 5RD

Abstract

The incidence of cryptorchidism in ram lambs of the North Ronaldsay breed was recorded between 1998 and 2005. The overall incidence of cryptorchidism was 7·4 per cent (ranging from 2·4 per cent to 18·2 per cent in different years). In 87·3 per cent of the cases only one testis was retained, with the right testis being affected in 78·5 per cent of all the cryptorchids.

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