[Practice-oriented approach to secondary retention in cattle]

Area of Science:

• Veterinary Medicine
• Animal Reproduction

Context:

• Veterinary practice research from 1983-1986 observed a decline in retained placenta incidence in cows.
• The Holstein-Friesian breed's potential role was noted but not confirmed.
• Data from 503 cows treated for retained placenta were analyzed.

Purpose:

• To investigate the causes of retained placenta in cattle.
• To differentiate between types of retained placenta based on clinical presentation and parturition events.

Summary:

• Two distinct types of retained placenta were identified: one not easily "peeled off" (associated with premature or unexpected births) and another that is "peeled off" (associated with normal parturition).
• Silage quality fed during the last month of gestation varied, with a significant portion being moderate-to-poor quality.

Impact:

• Provides a clearer understanding of retained placenta etiology in dairy cows.
• Contributes to developing targeted management strategies to reduce the incidence of retained placenta.
• Informs future research on the influence of breed and nutrition on placental health in cattle.