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Has your dog been exhibiting maternal or nesting behaviors? Perhaps getting aggressive over clothes they’ve claimed? Or are they babying a particular toy more than the others? Even if your dog hasn’t been bred, false pregnancy in female dogs is a fairly common condition. Whereas some dogs have no symptoms of false pregnancy, others may have more than a few.

First, What is False Pregnancy in Female Dogs
False, phantom, and pseudopregnancy all indicate a process where female dogs present behavioral and physical signs of pregnancy without actually being pregnant. Plus, it can affect any breed or age of female dog.
When Does False Pregnancy Occur in Dogs
Signs of pseudopregnancy in dogs typically begin 6 to 8 weeks after their heat cycle. Some dogs only have symptoms for a few weeks, but in others, symptoms could last longer. Additionally, some dogs experience pseudopregnancy repeatedly.
What Causes False Pregnancy in Female Dogs
- Pseudopregnancy in dogs is due to both progesterone and prolactin.
A rapid decline in progesterone raises prolactin, which is responsible for many of the behaviors associated with false pregnancy.
- Spaying a dog during the time when progesterone levels are high following the heat cycle is another cause of false pregnancy.
Signs of pseudopregnancy may develop 3 to 4 days after spay due to the sudden drop in progesterone.
- Treatment with progestins unrelated to false pregnancy can cause pseudopregnancy.
Progestins can be used from skin to behavior issues. But, primarily, it’s used to control the reproductive cycle. And one of the side effects include increased secretion of prolactin.
- and Health issues
Hypothyroidism and/or liver dysfunction can also cause increased levels of prolactin.

Signs of False Pregnancy in Female Dogs
Generally, the signs of a false pregnancy are similar to a real one or even postpartum behavior. While some symptoms are more apparent, others are not. But some of the signs include
- swollen mammary glands
One of the first clinical signs of pseudopregnancy are swollen or enlarged mammary glands. Females going into their heat cycle can also get swollen mammary glands. However, if they’re still enlarged weeks after the cycle, then it’s possible phantom pregnancy is to blame.
- lactation
It’s also likely for the enlarged glands to secrete milk, especially if the dog self-nurses or licks their abdomen a lot.
- weight gain
Some people think the weight dogs gain is fluid retention. Though, after we had Sophie spayed, the vet informed us that she had the largest uterus she’d ever removed. In addition, she asked us how many pups Sophie had. But, Sophie never had any. Based on this, it could be possible that the uterus is preparing for puppies.
- nesting
Dogs going through a false pregnancy will make a “nest,” either under a bed or similar, that will be a safe place for their puppies.
- maternal activity
Motherly behavior and nesting are the 2 most common behavioral signs presented in false pregnancies. With maternal activity, your dog may adopt clothes, shoes, or a plush toy as their “baby.” And heaven help you if you try to take them away.
- aggression
The “mother” dog gets anxious and distressed if people look at her “baby” or try to touch her “baby.” She may even attack if she feels they’re threatened. This can look a lot like resource guarding.
- appetite loss
During pseudopregnancy, it’s not unusual for dogs to lose their appetites.
- vomiting
Some dogs experiencing false pregnancy might be nauseated and throw up.
- and decreased activity
Lastly, false pregnancy can make your dog tired.

Is False Pregnancy Dangerous
Most false pregnancies are normal and will resolve on their own. On the other hand, some can be extreme and fail to remedy on their own. Furthermore, if the symptoms aren’t because of a heat cycle, it’s best to have a veterinarian’s opinion, since a health issue could be to blame. Moreover, according to this article, about 33% of dogs with pseudopregnancy symptoms are surrendered, especially if they’re recurring.
False vs Real Pregnancy
Signs of pseudopregnancy are similar to late-term real pregnancy in dogs. So, vets confirm a real pregnancy with a pregnancy test, that measures hormone levels, or with ultrasound. And they palpate the dog’s abdomen.
How to Treat a False Pregnancy
- At home you can distract your dog with plenty of exercise and play time.
- Remove the item they’ve claimed as their “baby.”
- Don’t stimulate the mammary glands; and if your dog is licking that area, get an Elizabethan collar to prevent that.
For more troublesome or prolonged symptoms, see your vet. It could be a medical issue. Moreover, there are medications available that alleviate some of the symptoms, like cabergoline that inhibits prolactin. And to prevent future false pregnancies, the best option is to spay your dog. However, you want to wait to spay until the fake pregnancy is over.

In Summary
False pregnancy in female dogs is a natural condition that occurs mainly due to a rise in prolactin. Most signs involve mothering and nesting behaviors. But it’s not unusual to see enlarged mammary glands either. While most cases will resolve on their own, some might require a visit to the vet. And the best thing you can do for your dog is to distract her by playing with her, letting her get exercise, removing her “baby,” and not stimulating her mammary glands. But, sometimes dogs will need help with medication. And the best option to permanently prevent any future occurrences of false pregnancy is to have your dog spayed.
Sophie only had 2 heat cycles. After her very first one, she developed enlarged mammary glands that stayed swollen till a couple of weeks or so ago. She also lost a little weight and interest in playing. And over time, she adopted a hoodie of my husband’s. It became her “baby.” Before she adopted any “babies,” we thought she was having a false pregnancy. But after some more time, her behavior seemed to improve. And then she claimed the hoodie. So much time had passed, that to me it looked like resource guarding. She would growl like she was ready to kill anyone who got too close. Eventually she started nesting under my middle daughter’s bed. If anyone even looked at her, she’d growl threateningly. We would take the “baby” away, only for her to steal a different one.
Recently she got spayed. And that’s when we heard about how big her uterus was. Unfortunately, she still had the nesting behavior and “baby” issue going on. According to what I’ve read, a dog that’s pseudopregnant at spay will still be pseudopregnant after spay. So it would be natural to assume that Sophie’s been in false pregnancy for months, and even was spayed during it. Since her spay, we took away her “baby.” However, she hasn’t tried to take any more “babies,” and she’s no longer nesting. Consequently, she’s a much better behaved dog than she was before. Therefore, was she pseudopregnant? Or was she just attached to the hoodie and acting like a mother?
Have you ever witnessed pseudopregnancy in a dog? Did you know what was going on? If you had a dog that ever experienced a false pregnancy, how did the situation resolve?
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