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Veterinary /
StandaloneMedia /
Multiple follicle hierarchy
Multiple follicle hierarchy
Multiple follicle hierarchy

Finding during necropsy for increased hen mortality.

Courtesy of Dr. Rodrigo Espinosa.

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Merck & Co., Inc., Kenilworth, NJ, USA is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world.  The Merck Veterinary Manual was first published in 1955 as a service to the community.  The legacy of this great resource continues as the Merck Veterinary Manual in the US and Canada and the MSD Manual outside of North America.

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