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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

    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. Diestrus is the period following mating. Diestrus lasts approximately 56 to 60 days in a pregnant ...

  4. Pyometra - Wikipedia

    en.wikipedia.org/wiki/Pyometra

    Pyometra is a result of hormonal and structural changes in the uterus lining. This can happen at any age, regardless of how many heat cycles have occurred or previous pregnancies (or lack thereof), although it becomes more common as the dog gets older. The main risk period for a female is for eight weeks after her peak standing heat has ended. [2]

  5. 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]

  6. Menstruation (mammal) - Wikipedia

    en.wikipedia.org/wiki/Menstruation_(mammal)

    Many zoologists regard this as different from a "true" menstrual cycle. Female domestic animals used for breeding—for example dogs, pigs, cattle, or horses—are monitored for physical signs of an estrous cycle period, which indicates that the animal is ready for insemination.

  7. Adorable Goldendoodle Goes All Out to Stop Dad From Reading ...

    www.aol.com/adorable-goldendoodle-goes-stop-dad...

    It's a great way to get a shy dog or puppy out of their shells. If your dog gets separation anxiety don't think they can't go! They'll get lots attention and love at doggy daycare.

  8. Pseudopregnancy - Wikipedia

    en.wikipedia.org/wiki/Pseudopregnancy

    Like dogs, mice are spontaneous ovulators. However, they will not become pseudopregnant following an estrus in which the female does not mate because the corpus luteum will degrade rapidly in the absence of coitus. When the female is mated by an infertile male, the corpus luteum persists without an embryo, leading to pseudopregnancy.

  9. Dog - Wikipedia

    en.wikipedia.org/wiki/Dog

    A female dog nursing her newborn puppies. The female dog may produce colostrum, a type of milk high in nutrients and antibodies, 1–7 days before giving birth. Milk production lasts for around three months, [120] [121] and increases with litter size. [121]

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