Preg-Alert Pro®


The PREG-ALERT PRO® is a multi-purpose, microprocessor based A-Mode ultrasonic instrument providing a digitally enhanced analog presentation (similar to the Preg-Alert, but with greatly improved readability and ease of use and accuracy). It is used for the detection of pregnancy in most mammals ranging in size from large rabbits to cattle. Also, for the thickness measurement of backfat and loin muscle and for blubber thickness in certain aquatic animals and breast thickness in chickens. It provides all of the functionality of the former world-famous Preg-Alert plus several new features.

Retail price in the United States: $1,558.00

Optional Deep Probe for Cattle, mares and other large mammals: $409.00


Online ordering is currently disabled while we adjust the system. Please call us at 1-800-359-8181 or 612-338-6124 and we can take your order over the phone.

SKU: N/A Category:


Determine Pregnancy and Backfat and Loin Thickness the Easy Way

Provides an analog type display in a digital environment. The digitally enhanced analog display provides a clean, easy to read presentation that can be held on the screen for as long as the user desires.

Display provides specific information as to the location of the echoes of interest. For thickness measurements, distance is also given numerically.

Microprocessor-based design provides wide flexibility in operating features.

Combines many features in an easy to use instrument.

The Preg-Alert Pro is a multi-purpose highly versatile A-Mode ultrasonic instrument for performing the following tests and measurements in a wide range of animals:

  • Pregnancy detection in mammals ranging in body size from large rabbits and foxes to cattle and horses. 
  • Backfat thickness measurement (in mm or inches) for animals having one, two, or three layers of backfat. Loin muscle thickness measurement (in mm or inches). Uses the appropriate speed of sound factor when measuring fat or muscle.
  • Also measures the thickness of certain other tissues, such as breast thickness in poultry and blubber thickness in some aquatic animals, e.g. the Harbour Porpoise.

 The testing process is totally non-invasive, minimizing the chance of infection and disease transmission.

Pregnancy detection is done in several ways:

  1. By detecting reflections (echoes) from the thickening of the uterine walls 
    in those animals where this occurs, which take place very early in the pregnancy cycle. 
  2. By detecting the echoes from the interface between amniotic fluid and 
    the far side of the intrauterine wall. 
  3. By detecting the echoes from the fetus(es). When measuring thickness, the user can restrict the maximum screen depth displayed in order to avoid spurious and non-meaningful data beyond the region of interest. Once a reading is obtained, one of the HOLD keys can be pressed to keep the reading on the screen until the key is pressed again to release it. The screen is backlit to aid in low visibility environments.

The instrument is a small handheld device powered from 4 disposable size AA cells. It is made from high impact plastic and though not waterproof, it is shielded to conform to all current applicable standards for electronic immunity and emissions. It is designed to withstand adverse environmental conditions, normally associated with animal production.


W: 4.125 x L: 8.75 x H: 2.5 inches (10.48 x 22.2 x 6.35cm ) 
1.34 lbs (.61kg) (net)
Operating Temperature range:
-20°F – +100°F (-29°C – +37.8°C)

Retail price in the United States: $1558.00

Optional Deep Probe for Early Pregnancy Detection in Cows & Mares.  (The standard probe may be used after 90 days gestation.)   $409.00