alexa Bovine retained placenta: aetiology, pathogenesis and economic loss.
Veterinary Sciences

Veterinary Sciences

Journal of Veterinary Science & Technology

Author(s): Laven RA, Peters AR

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Abstract The literature on the effects and causes of retained placenta in the cow is reviewed. On a herd basis the condition can adversely affect milk yield and fertility, but on an individual cow basis the effects are unpredictable. The aetiology of retained placenta has been extensively studied and many causal factors have been implicated, but little is known of how many of them cause the condition. As a result its prevention and prediction is uncertain, primarily because of the lack of knowledge of the normal process of placental release. Vascular changes and uterine contractions play a role in placental release, but current opinion suggests that the primary cause of retained placenta is the retention of the feto-maternal union. Release only occurs after a process of maturation, which involves hormonal and structural changes. The factors which are thought to influence these changes, and thus cause the condition, are discussed.
This article was published in Vet Rec and referenced in Journal of Veterinary Science & Technology

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