Anestrus – Definition & Meaning

Anestrus is a term used in veterinary medicine to describe a period of temporary sexual inactivity in female animals. This condition is characterized by a lack of ovarian activity, which results in the absence of estrus or heat cycles. In this article, we will explore the definition, origin, meaning, associations, synonyms, antonyms, and example sentences of anestrus.

Definitions

Anestrus is defined as a period of sexual inactivity in female animals, during which there is no ovarian activity or estrus cycles. This condition is a normal physiological process that occurs in all female animals, including birds, mammals, and reptiles. Anestrus is a temporary condition that usually occurs between breeding seasons or during pregnancy.

Origin

The term anestrus comes from the Greek words “an-” meaning without, and “oistros” meaning sexual desire. The term was first used in the field of veterinary medicine to describe the period of sexual inactivity in female animals.

Meaning in different dictionaries

According to the Merriam-Webster dictionary, anestrus is defined as a period of sexual quiescence in female animals that is marked by the absence of estrus cycles. The Oxford English Dictionary defines anestrus as a period of sexual inactivity in female animals that occurs between breeding seasons or during pregnancy.

Associations

Anestrus is associated with a variety of physiological and environmental factors, including age, season, nutrition, and stress. In young animals, anestrus is a normal part of sexual development, while in older animals, it may be a sign of reproductive senescence. Seasonal changes in day length and temperature can also affect the onset and duration of anestrus. Poor nutrition or high levels of stress can also delay or prolong anestrus.

Synonyms

Some synonyms of anestrus include sexual quiescence, sexual inactivity, and non-breeding season.

Antonyms

Antonyms of anestrus include estrus, heat cycle, and breeding season.

The same root words

The same root words as anestrus include oestrus, meaning sexual desire, and estrus, meaning heat cycle.

Example Sentences

  1. The mare was in anestrus for several months before she began cycling again.
  2. The zookeeper noted that the female lion was in anestrus during the winter months.
  3. The veterinarian diagnosed the dog with anestrus due to her age and hormonal imbalances.
  4. The farmer planned his breeding schedule around the anestrus period of his cows.
  5. The biologist studied the effects of nutrition and stress on the onset of anestrus in wild animals.
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