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  2. Estrous cycle - Wikipedia

    en.wikipedia.org/wiki/Estrous_cycle

    A female dog is usually diestrous (goes into heat typically twice per year), although some breeds typically have one or three cycles per year. The proestrus is relatively long at 5 to 9 days, while the estrus may last 4 to 13 days, with a diestrus of 60 days followed by about 90 to 150 days of anestrus.

  3. Canine reproduction - Wikipedia

    en.wikipedia.org/wiki/Canine_reproduction

    During proestrus and estrus, females may have a clear, blood tinged, or bloody discharge. Dogs during these stages are often informally referred to as being in heat. The length of these cycles varies greatly among breeds and even between individuals of the same breed. Proestrus and estrus can last anywhere from 5 days to 21 days. [5] 3.

  4. Dog breeding - Wikipedia

    en.wikipedia.org/wiki/Dog_breeding

    Dogs reach puberty between 6 and 24 months old, at which age female dogs will start having an estrous cycle. There are four stages of estrous: proestrus, estrus, diestrus, and anestrus. A dog in estrus, also known as being "in heat", can become pregnant during this 3- to 21-day period. [3]

  5. Long Haired Dachshund's 'Phantom Pregnancy' Tugs at ... - AOL

    www.aol.com/long-haired-dachshunds-phantom...

    It’s best to wait at least eight to ten weeks after your dog was last in heat before spaying her. Depending on the breed, dogs go into heat 1-3 times per year. Purina explains why Mia may be so ...

  6. How long do dogs live? We checked with a vet - AOL

    www.aol.com/long-dogs-live-checked-vet-080000777...

    This collar has a long-lasting formula that protects dogs and puppies from fleas and ticks for up to eight months. It starts working within 24 hours to offer fast relief to your pooch. View Deal

  7. 21 Dog Breeds That Can Handle Hot Weather (and 6 That ...

    www.aol.com/21-dog-breeds-handle-hot-160000402.html

    Tara Gregg / EyeEm/Getty Images. Height: 17 - 20 inches Weight: 25 - 46 pounds Personality: Smart, Playful Activity Level: High Shedding Factor: Moderate Life Expectancy: 10-13 years Full ...

  8. List of mammalian gestation durations - Wikipedia

    en.wikipedia.org/wiki/List_of_mammalian...

    Another factor is due to the shortage of food stocks during winter as the insects are being driven away and as the result, bat hibernate in pregnant condition. [24] In pinnipeds, the purpose of delayed implantation is in order to increase survival chance of the young animals as the mother ensure that the neonates are born at an optimal season. [25]

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