Here are some possibilities, depending on the reason for the inability to reproduce:
General Terms:
* Infertile heifer: This is the most straightforward and accurate term.
* Non-breeding heifer: This emphasizes the heifer's inability to participate in breeding.
More Specific Terms (Depending on the Cause):
* Freemartin: This refers to a heifer born twin to a bull. This condition often results in sterility.
* Hysterectomy: This refers to the surgical removal of the uterus, rendering the heifer unable to reproduce.
* Ovarian problems: A heifer may be unable to reproduce due to various ovarian issues, such as cysts or hormonal imbalances.
* Uterine problems: A heifer may have uterine abnormalities that prevent conception or pregnancy.
* Genetic defects: Some genetic conditions can cause infertility.
It's important to note: The terms used in livestock management may vary depending on the specific breed, region, and industry practices. If you're working with cattle, it's best to consult with a veterinarian or livestock expert for the most accurate terminology.