The use of ultrasound in the dairy industry is a crucial tool for detecting early pregnancies, identifying open cows and fetal sexing. Click to learn more about ultrasound use on dairies.

ReproScan ultrasound equipment provides solutions for all the challenges of dairy cattle reproductive ultrasound. When selecting ultrasound equipment for dairy cattle reproductive examinations, one needs to consider many factors.

Early Pregnancy Diagnosis

A presumptive diagnosis of pregnancy can be made as early as 26 days. This diagnosis is based on the presence of clear uterine fluid and a functional Corpus Luteum greater than 20 mm on the same side as the fluid. These pregnancies must be rechecked as the rate of pregnancy loss at this stage can be quite high. Very early pregnancy testing is usually done with a handheld 6.5 MHz linear rectal probe such as BoviScan HD, BoviScan Linear or ReproScan Flexx (6.5 MHz probe). Pregnancy testing 30 days and up gets considerably easier to perform. The heartbeat in the embryo can be used confirm the viability of the pregnancy. The 4.0 MHz convex rectal probe can be used for early pregnancy exams with the “arm in cow” method. The larger field of view makes some examinations easier but there is a slightly lower resolution with the larger scanning area. Extension arm ultrasound usually starts at 35 days and up in moderate sized seasonally bred dairy cattle.

Examination of Ovarian Structures

Ovarian examinations are usually done with a 6.5 to 7.5 MHz linear rectal probe such as the BoviScan HD, BoviScan Linear or ReproScan Flexx (6.5 MHz probe). The presence or absence of a functional Corpus Luteum is often used to determine which estrus synchronization program will best suit an individual cow. Some veterinarians prefer a C20 micro convex probe on their BoviScan or ReproScan Flexx unit. Please contact your ReproScan representative to discuss which ReproScan or BoviScan unit is right for your dairy practice.

Fetal Aging Pregnancies less than 120 days (17 weeks)

Fetal aging in early pregnancies is done by measuring the fetus with the 1 cm grid or 2 cm grid. Fetal aging charts are available. Crown rump length and head diameter are the most commonly used measurements.

Fetal Aging Pregnancies over 120 days (over 17 weeks or 4 months)

Fetal aging dairy cattle in advanced stages of pregnancy is more difficult and less accurate than earlier in gestation. The 4.0 MHz convex rectal probe with its larger field of view is better for later term examinations and dry off checks.

Fetal Gender Determination (Fetal Sexing)

Fetal sexing is usually done by “arm in cow” method from 58 to 80 days with a 6.5 MHz linear rectal probe such as on the BoviScan HD, BoviScan Linear or ReproScan Flexx. Fetal sexing can be done with the 4.0 MHz convex rectal probe with or without the extension arm. Depending on the size of dairy cattle, sexing fetuses from 70 to 90 days often works out better when using the 4.0 MHz convex rectal probe.

Pregnancy Testing in Seasonal Dairies

Seasonal dairy cows are often smaller framed and easier to pregnancy test. The 4.0 MHz ReproScan XTC and the BoviScan Curve do an excellent job of pregnancy testing seasonal dairy cattle. This type of pregnancy testing is similar to cow-calf pregnancy testing. The ReproArm extension arm is used to increase speed and reduce fatigue and injuries to the veterinarian. Fetuses are often aged in 5 day increments from 35 to 100 days.

Seasonal dairying is a large industry in New Zealand and extension arm ultrasound is used by 100% of veterinarians and technicians that provide pregnancy testing services to these dairies.


Application Icon

Apexx Linear

The Apexx by ReproScan is designed to elevate your ultrasound experience. Utilizing the trusted foundations of our other models, we designed a unit with improved image quality and more viewing device options. Apexx takes image quality to new heights with its 128-crystal probe and now offers Wi-Fi capabilities. Its durability paired with an interchangeable battery ensures this ultrasound machine will last all day no matter your working environment. The Apexx Linear unit paired with our direct-wired OJO goggles ensure reliable connectivity every time for dairy applications.

  • 128 element linear probe
  • Rapid zoom option of 44-93 mm deep
  • Wi-Fi capability
Application Icon

ReproScan XTL

ReproScan XTL is a durable, portable, linear probe ultrasound unit with wireless capabilities. This ultrasound design has proven durability. With a freeze button, CINE loop and interchangeable battery you have all the features you will need for a full day scanning.

  • 6 hour lithium ion battery
  • 4 hour charge time
  • Charge from 120/240 VAC or 12 DC (Car Charger)
Application Icon

ReproScan XTC

ReproScan XTC is a durable, portable, convex probe cattle ultrasound unit with wireless capabilities. It is designed to be paired with the ReproArm for rapid pregnancy diagnosis and the alleviation of shoulder and arm strain.

  • 4.0 MHz 60mm convex rectal probe
  • Wireless or directly wired 2.0 Monitor
  • Freeze button
Application Icon


The Everyday Ultrasound is designed for rural mixed animal practice. You will use the Flexx to improve examinations of every species in the clinic and out on the road.

  • Five probe options
  • 8 Preset Exam Settings per probe
  • Image Export to FLEXX Android App
Application Icon

BoviScan Linear

The Linear by ReproScan is marked by it’s simplicity. Designed specifically for “arm-in-cow” ultrasound examinations, this unit is lightweight, user-friendly, and portable.

  • 6.5 MHz 60 mm linear rectal probe (5.0 to 9.0 MHz)
  • 80 element probe
  • 4.0 to 7.5 MHz Probe Frequency Range
Application Icon

OJO Goggles

The OJO V4s offer a lightweight, streamlined design allowing you increased peripheral vision. A simple design with multiple mounting options makes it customizable for your environment. With the sunshade, these goggles afford you the ability to work out in the bright sunlight.

  • Lightweight 4oz. (113 grams)
  • Increased Peripheral Vision
  • Large Image Display 4:3 Ratio


I work with *
Send me information for *
My training interest
How did you find us?
Additional Comments *