N
Glam Journal

What is included in a breeding soundness exam?

Author

William Burgess

Updated on March 11, 2026

What is included in a breeding soundness exam?

The breeding soundness examination (BSE) involves a complete and systematic evaluation of the reproductive potential of a given male, including mating ability and libido, general physical examination and inspection of the genital organs, and assessment of sperm production and quality.

What are the 4 major parts of the bull breeding soundness exam?

A BSE consists of the following four components:

  • Physical exam. A bull needs to be able to see, eat, smell, and move around to successfully breed cows.
  • Scrotal circumference. This measurement evaluates testicular size and health as well as estimates the bull’s sperm-producing capacity.
  • Sperm motility.
  • Sperm morphology.

How much does a breeding soundness exam cost?

The average breeding soundness exam costs between $55 to $65 per bull and depending on the veterinarian the cost can go down based on the volume of animals tested. Both Koziol and Armstrong believe the benefits of performing a yearly breeding soundness exam outweigh the costs and time it takes to do the exam.

What are the components of a breeding soundness evaluation BSE )? *?

The BSE includes anatomic and structural correctness, freedom of disease, body condition, scrotal circumference, and semen quality.

What physical traits would a veterinarian assess during a breeding soundness exam?

During the structural soundness assessment, the veterinarian examines the overall condition of the animal including the flesh, feet, legs, eyes and teeth.

What is a good sperm count for a bull?

At least 100 sperm should be counted, and the proportion of sperm showing different types of abnormalities noted. However, the only number used in the evaluation of the bull is the proportion of normal sperm, which should be >70%.

What is morphology in a bull?

The morphology result is an indication of the quality of the semen at that point in time alone. However, if the % Normal is high, the bull has somewhat more of a buffer and can afford to decrease more in % Normal as a result of stress than a bull that inherently / genetically produces low % Normal semen.

Can a bull go sterile?

Bull fertility can be a major limiting factor in a breeding program. Infertility rates in bulls are estimated to be between 15 to 25 percent in the United States and Canada.

How can you tell if a bull is sterile?

The evaluation includes a physical examination, measurement of scrotal circumference, and evaluation of semen quality. To pass a breeding soundness evaluation, a bull must have at least 30 percent sperm motility, 70 percent normal sperm morphology, and a minimum scrotal circumference based on age (Table 1).

What physical traits would a veterinarian assess during a breeding soundness exam select all that apply?

What is the rule of thumb for bull to cow ratio with a bull under 24 months of age?

Also a commonly asked question is: “How many cows should be mated to young bulls?” The old rule of thumb is to place the young bull with about as many cows as his age in months. Therefore the true “yearling” would only be exposed to 12 or 13 females.

What is a bull breeding soundness exam?

The breeding soundness exam (BSE) is much more than a “semen test.” It consists of a physical exam that should include examination of the eyes, feet and legs, teeth (if an older bull), and general overall condition. The bull should show a menace (blinking) response when its eyes are examined.