Yes, dogs can "smell" pregnancy because they detect significant changes in a human's body chemistry and hormones, which alter their familiar scent, often leading to increased sniffing, attentiveness, or protective behaviors toward the pregnant person's belly. While they don't understand the concept of a baby in the womb, their powerful sense of smell picks up on subtle shifts in hormones like estrogen and progesterone, indicating something new is happening.
Short answer: Yes--many dogs do form recognition of their future littermate during a pregnancy, primarily through scent, routine changes, and social cues, though recognition is not identical to human anticipatory understanding.
Other behaviors you might see with these ultra-loving behaviors are dogs pushing people away from your belly or the oh-so-cute way they will rest their head on your bump. Your dog might start licking and nuzzling into your belly and legs or spend a lot of time smelling your face, crotch, or belly.
Sniffing is a normal way dogs say hello and gather social data. Sniffing your belly can be a friendly investigation and a sign of trust--your dog is comfortable approaching a non-threatening area. Dogs can detect subtle changes in scent caused by illness, hormonal shifts, pregnancy, or changes in gut flora.
Because canine hearing is much more sensitive than human hearing, it's possible your dog could hear the baby's heartbeat sooner. Dogs can detect sounds much quieter than a human can, and from further away.
There's a reason dogs might seem more inseparable from their pregnant owners, as the parents-to-be get further along in their pregnancies. Not only do pups notice growing baby bumps, but some experts believe dogs can pick up on a change in scent from expectant mothers, according to the American Kennel Club.
There are many anecdotal reports of noticeable behavior changes in dogs when a family member becomes pregnant. The two ends of the reported behavioral spectrum range from a clingy, over-affectionate set of behaviors to a much more reactive, defensive set of behaviors.
As she explains, there is not an exact known time when dogs have been proven to perceive hormone-related changes in human pregnancy; however, there are significant hormonal changes that begin the second week after fertilization.
It's common for dogs to go on alert and become overprotective of their expecting owner from the very beginning of her pregnancy. Behaviorists have witnessed dogs growl, bark, or even block doors with their bodies to prevent other family members - even the baby's father - from coming into the same room as the mom-to-be.
They might sniff around it, lick it, or paw at it when they sense the changes in your womb. Most of the time, these behaviors are temporary.
Change in Scent
A mother's body chemistry and hormones alter during pregnancy, which can also cause her unique scent (an odor her dog knows intimately) to change.
Some pregnancy symptoms for a dog include: Lethargy and decreased activity. Changes in appetite. Changes in behavior.
"Pets, particularly dogs and cats, have highly developed olfactory senses that allow them to detect subtle hormonal changes in humans, including those associated with pregnancy," says Susan NilsonOpens a new window, a cat and dog training and behavior specialist and the owner and founder of The Cat and Dog House, which ...
When a woman becomes pregnant, her hormones surge, which may change her unique personal scent. Additionally, as her body changes—and her movement changes as a result—dogs can pick up on those changes and they may react to them.
It's All About the Smell
Over time, these can produce odors that are intriguing to your dog. To your pup, your belly button might smell like a concentrated version of you—a scent they find comforting and familiar. This natural curiosity about scents often leads to sniffing and licking behaviors.
Dogs might not know exactly what's going on when you're pregnant, but they can likely sniff out hormonal changes.
Introduce Your Dog to Baby Sights, Sounds and Smells
Let her investigate them, but if she picks them up, immediately redirect her attention to one of her own toys or chew bones. (Keep in mind that it might be difficult for your dog to tell the difference between her things and the baby's!
It is normal for your dog to become restless and anxious or irritable and defensive, and she may want to run off and hide while she gives birth to her puppies. Alternately, some dogs become especially clingy and want to be near their owners constantly when labor is near, instead.
A dog's ability to smell pheromones means they may be able to tell when a woman is ovulating.
It's totally fine, baby is very well protected in there. My two cats and my 65-lb dog were both all over me my first pregnancy. Now I've got all of them, plus a 25-lb toddler climbing me like a tree.
While dogs don't understand the idea of pregnancy, they can be sensitive to change. Their amazing sense of smell and hearing, and close bond with their owners, means they can pick up on anything different. Those might be differences in the pregnant person's behaviour.
In the first trimester, avoid alcohol, smoking, illicit drugs, and high-mercury fish; skip hot tubs/saunas and strenuous exercise; steer clear of raw/undercooked foods (meat, eggs, sprouts) and unpasteurized dairy; limit caffeine (under 200mg/day); don't clean litter boxes; and consult your doctor before taking any new medications or supplements.
Dogs who have anxiety issues often develop clingy dog behaviors. Interestingly, dogs can also become clingy if they sense our stress or anxiety. Dogs can also become clingy if you change their daily routine or make changes in the home or household that cause them stress.
Dogs don't just sense pregnancy in their owners—they may also pick up on it in others. You might have noticed your dog behaving differently around pregnant friends or family members. It's possible that dogs can sense pregnancy in strangers through the same changes in scent and body language.
Dogs say "I love you" through actions like leaning on you, making soft eye contact (releasing oxytocin), following you around, bringing you toys, licking, gentle tail wags, and cuddling, all signs of trust, affection, and bonding that show they feel safe and happy in your presence.