May 10, 2026, 10:18 am | Read time: 3 minutes
Many dog owners are familiar with the typical questions about their pet’s health and behavior. But as the female dog ages, a particularly interesting consideration arises: Does she experience something similar to menopause in humans, or is it entirely different for dogs? The answer is less obvious than it initially seems.
Is “menopause” even the right term for female dogs?
In humans, menopause describes the last menstrual period in a woman’s life. The so-called menopause—medically known as climacteric—encompasses a longer period during which hormone levels change and the production of estrogen and progesterone decreases. At the end of this phase, fertility ends permanently.
This clear distinction, however, cannot be directly applied to dogs. While female dogs also experience hormonal aging, there is no comparable end to their reproductive capability.1
Dogs and Their Fertility Cycle
Female dogs reach sexual maturity between 6 and 24 months, varying significantly by breed. It’s said that the smaller the dog, the earlier it reaches puberty. The frequency of fertility cycles also depends on breed and age. Typically, a female dog goes into heat every six to seven months, but this can vary greatly. Some breeds, such as the Basenji, go into heat only once a year.
During this time, the dog’s body undergoes several phases over a cycle lasting about 4–8 weeks, with the phases of proestrus and estrus referred to as “heat.” Before the so-called standing days, when the female is fertile, there is a slightly bloody discharge meant to attract males, as she can become pregnant only during 9 to 21 days. If the female is not mated during these fertile days and her mature eggs remain unfertilized, the thickened uterine lining is not shed like in humans but gradually recedes. Therefore, a female dog does not menstruate and does not experience menopause as understood in humans.2
Also interesting: When is a dog considered a senior?
Recognizing and Alleviating When Cats are in Heat
Why Isn’t My Female Dog Going Into Heat?
Do Female Dogs Not Experience Menopause at All?
If a female dog is older than seven years, the decrease in sex hormones may cause her to go into heat only once a year. Generally, she remains fertile until the end of her life. However, as she ages, she becomes physically weaker. Therefore, an older female dog should not be subjected to pregnancy. Hormonal changes often lead to the body acting erratically, resulting in increased fatigue, lethargy, hair loss, or weight changes.3
If the female dog’s heat completely ceases, it may be due to ovarian dysfunction or other conditions, such as hypothyroidism or adrenal hyperfunction. In this case, you should have your dog examined by a veterinarian for safety.
How Can the Stress of Lifelong Heat Be Avoided?
With spaying, a female dog can no longer go into heat and thus cannot become pregnant. Sterilization works differently; the dog won’t become pregnant but will continue to experience hormonal cycles. The advantages of spaying include significantly reducing the risk of certain cancers, such as cervical cancer. However, spayed female dogs tend to gain weight and are more prone to urinary incontinence as they age.
Incidentally, most animals do not experience classic menopause, including cats, which can still give birth twice a year at 15 years old. Besides humans, there are four whale species that go through menopause: killer whales, short-finned pilot whales, narwhals, and beluga whales. Like humans, they lose fertility but continue to live in their social groups and care for offspring as “grandmothers.”4