Understanding Mare Estrus: When Do Mares Stop Going Into Heat?

Learn at what age mares stop going into heat and factors affecting estrus cycles.

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Mares typically stop going into heat, or estrus, as they age. By the time a mare reaches 20 years old, she may show diminished signs of heat or stop cycling altogether. However, this can vary depending on the individual horse's health and management.

FAQs & Answers

  1. What is the normal heat cycle for a mare? A mare's normal heat cycle lasts about 21 days, with estrus lasting 3 to 7 days.
  2. Can health issues affect a mare's heat cycle? Yes, various health issues can alter a mare's heat cycles, including hormonal imbalances and overall health.
  3. What are the signs that a mare is in heat? Signs of a mare in heat include restlessness, increased urination, and behavioral changes around stallions.