Final answer:
Estrous synchronization in cattle involves controlling oestrous cycles hormonally, inducing ovulation with hormonal injections, and using artificial insemination techniques to coincide with the synchronized cycles.
Step-by-step explanation:
The three general approaches that have been used for estrous synchronization in cattle are:
- Control of oestrous cycles utilizing hormonal treatments such as progestogens or prostaglandin to regulate or synchronize the estrous cycles of a herd.
- Induction of ovulation through the use of gonadotropin-releasing hormone (GnRH) or human chorionic gonadotropin (hCG) to time ovulation to correspond with artificial insemination.
- Artificial insemination techniques such as intrauterine or intracervical methodologies to ensure semen is delivered effectively during the synchronized estrous period.
These methods allow for a more efficient breeding process and better management of reproduction in cattle herds.