The JorVet Freemartin Probe is a newly developed vaginal probe to detect freemartin heifers and/or
determine if heifers born co-twin to a bull have a normal reproductive tract.
The crucial probe end length is 7cm. Research has shown that no freemartin calf has a vaginal length
longer than 7cm.
The distal end of the narrower center section is 14cm from the tip. Over 95 percent of heifers born co-
twin to a bull and with a normal reproduction tract have a vaginal length of 14cm or more. Animals with
a vaginal length of 7-14cm should have chromosome testing done to confirm if a freemartin.
This probe is designed to be used on heifers 30 days or less of age.
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