Peer-reviewed veterinary case report
Miniature American Eskimo dog with 8-month prolonged proestrus and XO
By Löfstedt, R M et al.·Published in Journal of the American Veterinary Medical Association·1992·Department of Medicine, United States·View original on PubMed →
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Original publication title: Prolonged proestrus in a bitch with X chromosomal monosomy (77,XO).
Plain-English summary
A Miniature American Eskimo dog showed signs of heat (proestrus) that lasted nearly 8 months, which is unusually long. Despite these signs, her ovaries were small and not functioning properly, with no signs of normal egg development. This condition was linked to a genetic issue similar to Turner's syndrome in humans. The dog's reproductive system appeared mostly normal aside from her juvenile appearance. Unfortunately, the prolonged heat cycle indicated underlying reproductive problems that did not resolve on their own.
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Abstract
A stunted Miniature American Eskimo bitch that had signs of proestrus, which persisted for almost 8 months, had a 77,XO karyotype. Despite signs of proestrus, the ovaries were small and fibrous, and there was no evidence of ovarian follicle development or corpora lutea. Except for its juvenile appearance, the rest of the reproductive tract was grossly normal. Clinical signs in this bitch were similar to those in human beings with Turner's syndrome.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/1607315/