{"id":748,"date":"2025-09-11T20:53:25","date_gmt":"2025-09-12T00:53:25","guid":{"rendered":"https:\/\/www.englishtownvet.com\/blog\/?p=748"},"modified":"2025-09-12T20:56:18","modified_gmt":"2025-09-13T00:56:18","slug":"how-long-are-dogs-in-heat","status":"publish","type":"post","link":"https:\/\/www.englishtownvet.com\/blog\/how-long-are-dogs-in-heat\/","title":{"rendered":"How Long Are Dogs in Heat?"},"content":{"rendered":"
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If you have an unspayed female dog, our team<\/a> at Englishtown Vet MD<\/a> can help you better understand her heat cycle, so you can keep her healthy, safe, and comfortable. Let\u2019s take a look at the full picture\u2014timing, care, and how to prevent unplanned dog pregnancy.<\/p>\n\n\n\n\n\n\n\n

When Will an Unspayed Female First Go Into Heat?<\/h2>\n\n\n\n

Most dogs experience their first heat cycle between 6 to 12 months of age. Smaller breeds<\/a> tend to go into heat earlier, while larger breeds may not have their first cycle until they\u2019re closer to 18 to 24 months old.<\/p>\n\n\n\n

If you\u2019ve recently welcomed a young, unspayed female into your home, it\u2019s important to prepare for her first cycle. Signs may include swelling of the vulva, light bleeding or discharge, increased urination, and changes in behavior like restlessness or clinginess.<\/p>\n\n\n\n

Understanding Your Dog\u2019s Heat Cycle<\/h2>\n\n\n\n

A typical dog\u2019s heat cycle lasts about 2 to 3 weeks. Most female dogs go into heat about twice a year, but cycles can vary widely, especially in the early years.<\/p>\n\n\n\n

There are four stages of a dog’s heat cycle:<\/p>\n\n\n\n

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  1. Proestrus (7-10 days)<\/strong> \u2013 Initial stage with vulva swelling and bloody discharge. Males may be interested, but your dog won\u2019t yet be receptive.<\/li>\n\n\n\n
  2. Estrus (5-10 days)<\/strong> \u2013 This is when your dog is fertile and will be receptive to mating. Discharge may become lighter in color.<\/li>\n\n\n\n
  3. Diestrus (about 60 days)<\/strong> \u2013 Fertility ends, and the body returns to normal, whether or not the dog becomes pregnant.<\/li>\n\n\n\n
  4. Anestrus (several months)<\/strong> \u2013 The resting phase before the next cycle begins.<\/li>\n<\/ol>\n\n\n\n

    Do Dogs Naturally Stop Going Into Heat?<\/h2>\n\n\n\n

    Unlike humans, dogs do not go through menopause. An unspayed female will continue to experience heat cycles throughout her life, though the frequency and intensity may change with age. This makes ongoing management\u2014and eventual spaying<\/a>\u2014important for long-term health.<\/p>\n\n\n\n

    Caring for a Dog in Heat<\/h2>\n\n\n\n

    Caring for a dog in heat involves both physical and emotional support:<\/p>\n\n\n\n