Ultrasound has revolutionized equine breeding management over the last 20 years by providing accurate non invasive visual information on the mare s reproductive tract.
Equine pregnancy ultrasound images.
Initial pregnancy ultrasound and evaluate for twins day 18.
All of the images and videos below were produced using a universal s8 color doppler ultrasound from universal imaging bedford hills ny.
Date of ovulation days 14 16.
Third pregnancy examination with ultrasound to confirm fetal heartbeat and viability of pregnancy.
The vesicle is spherical and distinct and can be palpated from 18 d through 60 70 d and seen with ultrasound beginning at 10 or 12 d depending on the machine.
Most equine practices own one of many commercially available portable ultrasound scanners.
In addition transrectal ultrasound is often used to determine pregnancy especially if the mare has a history of twins or double ovulation.
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The test is 95 percent accurate.
A false negative result will be obtained if ecg assay is used as a pregnancy test in a pregnant mare before 40 or after 120 days of gestation.
More details about this unit are given at the foot of this page.
For pregnancy diagnosis real time linear array b mode portable ultrasound machines that are fitted with a rectal linear array scanner or probe are used.
Additional ultrasound examination may be needed for evaluation of twins days 25 30.
Equine gestation timeline first trimester.
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Equine ultrasound pregnancy images.
Second pregnancy ultrasound heartbeat evaluate for twins days 45 60.
Ultrasound has become the most common and reliable method for early pregnancy diagnosis in mares.
Other significant characteristics of equine pregnancy include the presence of chorionic girdle cells from the fetal trophoblast which invade the endometrium.
