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Ask the Vet

Is There a Morning-After Pill for Dogs? Our Vet Explains

Dr. Joanna Woodnutt BVM BVS (Veterinarian)
By Dr. Joanna Woodnutt BVM BVS (Veterinarian) · Written by Dr. Joanna Woodnutt BVM BVSVet Approved
Dr. Joanna Woodnutt BVM BVS
Reviewed & Fact-Checked byDr. Joanna Woodnutt BVM BVSVeterinarian
Joanna is an experienced veterinarian living in the United Kingdom. She has written about pets and their health for many blogs, pet magazines and pet websites and loves to help pet parents understand their pets through her writing.View authorThe information is current and up-to-date in accordance with the latest veterinarian research. Learn more
Updated on June 17, 2026
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Although it is not quite a “morning-after pill,” as it doesn’t prevent pregnancy, there are measures a veterinarian can take to help end a pregnancy in a female after an unwanted mating. However, it's not a treatment to be undertaken lightly, as there are potential side effects, it is not always completely effective, and, as with most things, prevention is better than cure.

This article should not be taken as a replacement for veterinary advice and any queries or concerns you have about your dog’s reproductive life and capabilities should be discussed directly with your veterinarian.

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Will My Vet Advise About Pregnancy in Dogs?

While some pet parents are very knowledgeable about their female’s reproductive system, others are not. People who have never had dogs before or who have had male dogs only may not be familiar with their female dog’s reproductive cycle. Therefore, it is important to discuss any questions you have with your veterinarian.

Usually, when you bring your new puppy to your veterinary clinic for their primary vaccination course, your veterinarian will go through various topics, including neutering/spaying, and will also be happy to answer any questions you may have about reproductive cycles, pregnancy, and its prevention. The primary vaccination course is an ideal opportunity to educate yourself on all aspects of your puppy’s health and welfare, as well as to look ahead and help preempt any unwanted outcomes.

However, accidents do happen, and if you find yourself in a position where you know that your female has had an unwanted mating, then you should book an appointment with your veterinarian as soon as possible to discuss the options. It should be noted though that mating does not always result in a pregnancy. This can be discussed with your veterinarian before any treatment.

Image Credit: Viktor Gladkov, Shutterstock

Injections to End a Pregnancy

Again, it should be emphasized that this article is not a replacement for a consultation with your veterinarian and is not comprehensive. There are injections that can induce the termination of a pregnancy in the female up to 45 days after mating by interfering with the hormones involved in pregnancy. The treatment consists of two injections given 24 hours apart by your veterinarian.

If your dog receives the injections after 20 days of pregnancy, her body will remove the fetus/fetuses from the uterus in a manner similar to giving birth. In earlier stages of pregnancy, the fetus/fetuses are resorbed. Your veterinarian will discuss with you what to expect and when to contact them if there is anything to be concerned about.

Success Rate and Side Effects of Injections

It should be noted that this treatment does not have a 100% success rate. There are also instances where there is a partial effect. Ultrasound can help confirm if the treatment has been successful in ending the pregnancy. If it has not been successful, then it's advisable to discuss further options with your veterinarian. If the treatment doesn’t work or has only worked partially and no further treatment has been carried out, your pregnant dog should be monitored closely throughout the remainder of her pregnancy.

On occasion, these injections can have side effects such as anorexia, depression, vomiting, and diarrhea. Again, if you are concerned about your pet, you should contact your veterinary surgeon. There can also be a reaction at the site of the injection, with localized pain and inflammation.

Image Credit: Photographee, Shutterstock
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Final Thoughts

As mentioned above, neutering is usually discussed with new puppy parents. As well as preventing unwanted pregnancies, neutering can prevent problems, such as pyometra or infection in the uterus, which can cause very serious illness in dogs, typically in middle-aged or older dogs. Obviously, neutering is not an option if you're planning for your dog to have puppies in the future. Again, as with any health or reproductive choices in your dog, you should discuss this with your veterinarian.

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Featured Image Credit: LightField Studios, Shutterstock

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Dr. Joanna Woodnutt BVM BVS (Veterinarian)
Authored by

Dr. Joanna Woodnutt BVM BVS (Veterinarian)

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2 Responses

TK
T. Kozy says:
March 14, 2026

what happens to the puppies when a pregnant dog gets the morning after pill and it doesn't work?

Radim Chudej
Radim Chudej says:
March 30, 2026

Hello there, thank you for reaching out to us and sorry for a bit of a late reply. This sounds like a question for a vet. Our in-house veterinarian Dr. Paola would be happy to answer it. Could you please submit it using this link? https://www.dogster.com/ask-dr-paola/ This section is exclusively for comments, but she will receive your question via that link. Although asking Dr. Paola is free, it is not certain that your question will be answered right away, so if you're interested in speaking to a vet face-to-face, you can book a video call appointment with one of our veterinarians from www.PangoVet.com. In a 20-minute call you can ask all your questions and our vets will take a look at your dog and give you their professional opinion. Thank you!

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