do any animals have periods?
236673
Apart from humans and our close relatives, the only animals that menstruate are elephant shrews and certain bats.
368831
The short answer is: Girls get periods because they have a uterus (womb). Guys don't have periods because they have don't have a uterus. The long answer is: Girls and guys have different reproductive organs. When girls get to a certain age they go through puberty and start to menstruate (have periods).
1191949
Like dogs, cats also have an estrous, or heat, cycle. However, female cats, which are called queens, are induced ovulators. This means that they do not ovulate (pass an egg) unless they are bred.
1076929
Mares do not naturally experience heat cycles (oestrus) during the winter and early spring months, although some mares will have a cycle all year round. In winter, a mare's reproductive system goes into a rest period, known as anoestrus. After this winter inactivity, the cycle usually begins again in spring.
1439869
A dog might gain weight, have larger breasts and nipples, display nesting behaviour and even produce milk, but she's actually not pregnant. This is a rare phenomenon that happens only in dogs.
905509
['Dogs.', 'Cats.', 'Pot-Bellied Pigs.', 'Rabbits.', 'Fancy Rats.', 'Guinea Pigs.', 'Horses.', 'Cockatoos.']
229987
On average, puberty (or sexual maturity) is reached at about six months of age, but this can vary by breed. Smaller breeds tend to have their first estrous cycle at an earlier age, while large and giant breeds may not come into heat for the first time until they reach eighteen months to two years of age.
818829
If you're a new pet parent, you may wonder, "Do cats have periods?" or "Why is my cat bleeding?" Female cats do, in fact, go through a monthly cycle, but their "periods" are quite different from human menstruation. Read on to find out what your cat in heat is feeling and what you can do to help.
815268
Asian elephants have a gestation period of 645 days and African elephants 640 days. Dogs and other canines have a gestation period of about 60, which is also the period for cats.
467233
One difference is that animals that have estrous cycles resorb the endometrium if conception does not occur during that cycle. Animals that have menstrual cycles shed the endometrium through menstruation instead. ... Humans have menstrual cycles rather than estrous cycles.
1161207
Unlike polyoestrus animals such as the cow or sow which can reproduce all year round some species such as the mare, ewe, goat, rabbit, hamster and doe have an anoestrus phase to their reproductive cycling. ... Such animals can be long or short day polyoestrus breeders.
1151265
When your pet is spayed, the entire reproductive tract (including both ovaries and the uterus) is surgically removed. Therefore, your spayed dog no longer has ovaries, produces estrogen, or goes into heat.
386764
In short: No. "In heat," or estrus specifically refers to the time in female dog's reproductive cycle where she becomes receptive to mating with males. According to the American Kennel Club, male dogs don't go into heat; instead, they're capable of conceiving year-round once they become fertile at about 6 months old.
145195
Puberty or sexual maturity in the female dog usually occurs around six months of age. The smaller breeds tend to go into oestrus or "heat" earlier and some females can have their first "heat" cycle as early as four months of age.
1341666
Most of the time, spaying or neutering will make your pet calmer and more affectionate. Females will no longer have heat cycles—which can last up to 3 weeks—during their breeding season.
4074
There is no menopause in dogs, so older female dogs continue to have heat cycles, but they will become further apart and her fertility will decrease.
1104685
The Estrus Cycle Although it may seem as though your Chihuahua has a menstrual cycle (vaginal swelling and bleeding for about nine days), dogs do not menstruate as humans and other primates do. Instead, dogs have an estrus cycle, which occurs (in small dogs like Chihuahuas) every four to six months.