Do dogs lay eggs?

Dogs do not lay eggs. In fact, dogs, like humans, are members of the mammal animal classification. In order for an animal to be classified as a mammal, they must* possess the following traits:
Have hair or fur
Give birth to live young
Drink milk from their mother
Are warm blooded
Are vertebrates
Because dogs are mammals, they do not lay eggs. They, (like us humans!) have all the characteristics of a mammal including giving birth to live young.
*It is important to note that the duck billed platypus, as well as a couple species of ant eaters, lay eggs even though they are mammals.


Dogs do not lay eggs. Instead, they are classified as mammals and give birth to live young. When females become sexually mature, they can become pregnant. They have an estrous cycle, whereby reproductive hormones cause changes that can lead to pregnancy.
Their reproductive cycle lasts from two to four weeks. Female dogs reach puberty between eight and eighteen months, depending on the breed. The hormone estrogen stimulates eggs to be released from ovaries, and if males mate with females during the period known as estrus, the females can become pregnant. Like all mammals, they have internal fertilization of their eggs.
After estrus, a period, known as diestrus, occurs, whether the dog is pregnant or not. At this time, the hormone progesterone is high.
The gestational period for canines is approximately 63 days, and the embryos develop in the uterus during this time. Dogs can have up to six puppies; however, this number can vary somewhat, depending on the breed.
Once the puppies are born, the females are capable of supplying nourishment to their young via their mammary glands, which can produce milk.
I have attached a link to an article about the anatomy of the reproductive system in dogs with an illustration of the female anatomy.
https://www.petcoach.co/article/anatomy-and-function-of-the-reproductive-system-in-dogs/

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