Thyroid hormone is crucial for regulating metabolism, growth, and development in cattle. It's produced by the thyroid gland, which is located in the neck.
Here's a breakdown of the two main types of thyroid hormone:
* Thyroxine (T4): The primary thyroid hormone produced by the gland.
* Triiodothyronine (T3): A more active form of thyroid hormone that is formed from T4 in various tissues.
Why is thyroid hormone important for cattle?
* Growth and development: It plays a vital role in the growth and development of calves, including their skeletal and muscle growth.
* Metabolism: It regulates energy expenditure, body temperature, and nutrient utilization.
* Reproduction: Thyroid hormone is involved in regulating the estrous cycle and fertility in cows.
* Milk production: It influences milk production in dairy cows.
Problems related to thyroid hormone in cattle:
* Hypothyroidism: This condition occurs when the thyroid gland doesn't produce enough thyroid hormone. It can lead to decreased growth, weight loss, and reproductive problems.
* Hyperthyroidism: This is less common but can occur when the thyroid gland produces too much thyroid hormone. This can cause weight loss, hyperactivity, and other issues.
Note: "TH" could also stand for other things in a specific context related to cattle, like "therapeutic handling" or "tissue harvesting," but thyroid hormone is the most likely interpretation. If you have more context, please provide it for a more accurate answer.