Definition: Anoestrus: The process by which an animal's uterus produces an embryo to replace a fertilized one after two or more days. Detailed definition: - Anoestrus occurs when an animal, typically a female mammal, has multiple eggs laid and each egg is fertilized by sperm but not yet mature enough for implantation. - This happens in the second trimester, which can last from 12 to 18 weeks after conception. The term "anoestrus" refers to the period when an animal's uterus produces an embryo. - In this process, the egg is placed into a small organ called the oviduct, and a fertilized ovum implants in the uterine lining. This creates a blastocyst. - As the blastocyst grows, it develops into an embryo, which undergoes multiple stages of development until it becomes a fetus or term pregnancy.
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