Ultrasonography is used commonly to evaluate ovaries, detect early pregnancies (27 days) and determine the sex of the fetus (55 - 70 days gestation).  Ultrasound is a very useful tool and can help utilize recipients more efficiently by early pregnancy testing and re-use of open recipients.  Examining the ovaries of donor cows and recipients can also be useful in determining if the ovaries are functioning properly.  Ultrasound is an excellent tool to use in general reproductive examinations as well.