Veterinary Manual

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Embryo Transfer in Farm Animals

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Video Sonogram of 30-Day Conceptus
Video Sonogram of 30-Day Conceptus
Video Sonogram of 30-Day Conceptus

At 30 days of gestation the dorsal yolk same is equal in size to the developing allantoic cavity. A heartbeat should be evident in the embryo proper after 25 days of gestation.

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Video of Ultrasonographic Examination of the Genital Tract, Mare
Video of Ultrasonographic Examination of the Genital Tract, Mare
Video of Ultrasonographic Examination of the Genital Tract, Mare

This video demonstrates a thorough examination that includes careful continuous imaging of the uterine body, each uterine horn and its ipsilateral ovary. A 22-day conceptus was imaged that precluded...

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Video Sonogram of 18-Day Unilateral Twins
Video Sonogram of 18-Day Unilateral Twins
Video Sonogram of 18-Day Unilateral Twins

Care should be taken to confirm the breeding date of the mare so that these 18-day unilateral twins will not be mistaken for a 30-day singleton.

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Video Sonogram of 45-Day Surviving Twin Post Reduction
Video Sonogram of 45-Day Surviving Twin Post Reduction
Video Sonogram of 45-Day Surviving Twin Post Reduction

This video of a 45-day fetus demonstrates the use of Doppler to highlight the blood flow in the twin that was not reduced in the transvaginal reduction.

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Video Sonogram of 45-Day Twins
Video Sonogram of 45-Day Twins
Video Sonogram of 45-Day Twins

The large hyperechoic (white) line that floats down into view is the adjacent chorions of the twins.

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