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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. 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. Dog behavior - Wikipedia

    en.wikipedia.org/wiki/Dog_behavior

    Female dogs have their first estrus ("heat") at 6 to 12 months-of-age; smaller dogs tend to come into heat earlier whereas larger dogs take longer to mature. Female dogs have an estrous cycle that is nonseasonal and monestrus, i.e. there is only one estrus per estrous cycle.

  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. Why do dogs get stuck when mating? Vet reveals ... - AOL

    www.aol.com/why-dogs-stuck-mating-vet-110007798.html

    In basic terms, dogs get stuck together after mating when the male's swollen penis becomes gripped by the contracting muscles in the female's vagina. The good news is, this is nothing to worry about.

  8. The 13 Best Dogs for First-Time Owners (& Which Breeds ... - AOL

    www.aol.com/lifestyle/13-best-dogs-first-time...

    As any first-time dog owner will tell you, dogs are a lot of work. Sure, some breeds are known for being more low-maintenance than others, but owning a...

  9. Why Is My Period Late? 6 Possible Reasons (Besides the ...

    www.aol.com/lifestyle/why-period-6-possible...

    Basically, it’s totally normal if, in the year or two after getting your first period, your body doesn’t immediately fall into a regular cycle. 4. You’re Breastfeeding.

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