MSD Manual

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MSD Manual
Veterinary Manual
The trusted provider of veterinary information since 1955

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VETERINARY PET
Estrous cervix, mare
estrous-cervix-mare-sertich-sized
Estrous cervix, mare

    Visual examination of the cervix during estrus reveals it to be moist, hyperemic, and relaxed, which reflects the lack of progesterone and the presence of estrogen.

Courtesy of Dr. Patricia Sertich.

Merck & Co., Inc., Rahway, NJ, USA (known as MSD outside of the US and Canada) is dedicated to using leading-edge science to save and improve lives around the world.  The Veterinary Manual was first published in 1955 as a service to the community.  The legacy of this great resource continues in the online and mobile app versions today.

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