Quick Answer: What Do They Do to Spay a Cat?
To spay a cat, a veterinarian surgically removes her ovaries and usually her uterus while she is fully asleep under general anaesthesia. The medical name for the standard operation is an ovariohysterectomy. Once the ovaries are gone, she can no longer become pregnant and she will stop going into heat.
Here is the short version of what happens. Your cat fasts overnight, then you drop her at the clinic in the morning. The vet checks her over, gives her a sedative and pain relief, and puts her under general anaesthesia with a breathing tube. The surgeon shaves and cleans a small patch of belly, makes a small incision, finds and ties off the blood vessels to the ovaries and uterus, removes those organs, and closes the wound in layers with stitches, surgical glue, or both. The surgery itself usually takes about 20 to 45 minutes. Most cats go home the same day, groggy but comfortable, and are back to normal within 10 to 14 days.
Spaying is one of the most common operations vets perform, and it is considered routine and safe for healthy cats. It also prevents unwanted litters, stops heat cycles with their yowling and restlessness, and removes the risk of uterine infection and greatly lowers the risk of mammary cancer when done early. This article walks through every step in plain language, so you know exactly what your cat will experience and what to do before and after.
What Spaying Actually Means
Spaying is the female version of sterilisation. In everyday language, people say a cat is “fixed” whether she is female or male, but the operations are different. Spaying applies to females; neutering, or castration, applies to males and removes the testicles.
In a standard spay, the surgeon removes both ovaries and the uterus. Removing the ovaries is the part that matters most: the ovaries produce the hormones that drive heat cycles, so without them there are no more heats, no more calling, and no more pregnancy. Removing the uterus as well means there is no chance of a uterine infection later in life, a serious condition called pyometra that can become an emergency in unspayed older cats.
Some vets perform a slightly different operation called an ovariectomy, which removes only the ovaries and leaves the uterus in place. The result for your cat is the same in everyday terms — no heats, no pregnancy — and research shows it is just as safe. Which version your vet uses usually comes down to their training and preference, and you do not need to insist on one over the other. A laparoscopic spay, done through tiny camera-guided incisions, is a third option offered by some clinics, usually at a higher price. The table later in this article compares all three.
One thing spaying does not do is change your cat’s personality in any bad way. Spayed cats are often calmer simply because they are no longer cycling through heats, but they do not become lazy or dull. They do tend to need slightly fewer calories after spaying, so your vet may suggest adjusting food portions — that is a feeding change, not a personality change.
When Should a Cat Be Spayed?
Most vets recommend spaying before the first heat, usually at around five to six months of age. Kittens can be spayed even earlier — many shelters spay at eight to ten weeks and at least 2 pounds in weight — and early spaying is safe when done by an experienced vet.
The timing matters for health, not just convenience. Spaying before the first heat gives the greatest protection against mammary cancer, which is the most common malignant tumour in female cats. Each heat cycle a cat goes through before spaying raises that risk a little more. It also means you never have to manage a heat cycle at all, with the loud yowling, restlessness, and attempts to escape outdoors that come with it.
That said, there is no age at which it is suddenly too late. Adult cats, senior cats, and cats who have already had kittens can all be spayed safely, as long as a health check shows they are fit for anaesthesia. Older cats may need bloodwork first, and the recovery may be a touch slower, but the operation itself is the same. If you have adopted an adult cat and are not sure whether she is spayed, your vet can usually tell from a small scar or a tattoo mark on the belly, and an ultrasound can settle it if needed.
Cats can also be spayed while in heat or even in early pregnancy, though both situations make the surgery a little more involved: tissues are more swollen and blood-rich in heat, and the operation takes a little longer. Vets will talk through the extra cost and risk with you rather than refusing outright, so if your cat has already come into heat, do not put the appointment off — book it and let the vet decide the best day.
Before Spay Day: How to Prepare
Preparation is simple, and most of it is about fasting and keeping your cat calm. Your clinic will give you its own instructions, and those always win over general advice, but the usual plan looks like this.
- Fasting. Food is usually withheld for 8 to 12 hours before surgery, often from the evening before a morning operation. This is because anaesthesia can cause nausea, and an empty stomach makes vomiting under anaesthesia far less likely. Water is often allowed until a few hours before, but follow your clinic’s exact times.
- Keep her indoors the night before. An outdoor cat who disappears on surgery morning is a surprisingly common cause of a cancelled appointment. Keep her in the night before so the morning is stress-free.
- A normal carrier, not a new one. Put a familiar blanket in the carrier and keep the morning calm. Do not bathe her the day before surgery — a clean belly is the surgeon’s job, and a bath adds stress for no benefit.
- Tell the clinic about medicines and health changes. Mention any medicines, supplements, vomiting, diarrhoea, sneezing, or changes in appetite. A cat who is unwell on the day may need the surgery postponed, and that is the safe call.
- Ask about pain relief and bloodwork. Most clinics include pain relief as standard now, but it is worth confirming. For adult and senior cats, pre-anaesthetic bloodwork checks the liver and kidneys, which process the anaesthetic drugs. It is a sensible extra, not an upsell.
You do not need to buy special equipment in advance, but having a recovery cone or a surgical recovery suit ready at home saves a stressful trip to the pet shop on surgery day. Your clinic will often send one home with you anyway.
What Happens on Spay Day, Step by Step
Spay day follows a predictable routine at almost every clinic. Knowing the order helps because the part owners worry about most — the surgery itself — is actually the shortest part of the day.
1. Drop-off and health check
You will usually drop your cat off in the morning. A vet or nurse weighs her, listens to her heart and lungs, checks her temperature, and looks at her gums and overall condition. This is the final go or no-go check. If anything looks off, the vet may postpone surgery rather than take a risk, and that is a sign of a careful clinic, not a problem.
2. Sedation and pain relief
First, your cat gets an injection of sedative medicines, usually into a muscle. These calm her, reduce anxiety, and start the pain relief before anything uncomfortable happens. Many clinics also give a pain-relieving injection at this stage, so pain control is already working before the surgery starts rather than catching up afterwards.
3. General anaesthesia and monitoring
Once she is drowsy, the vet places an intravenous catheter, usually in a front leg, so fluids and medicines can be given directly. Then general anaesthesia is induced, most often with an injection followed by anaesthetic gas through a breathing tube placed in her windpipe. That tube is important: it keeps her airway safe and lets the vet control her breathing and oxygen precisely.
Throughout the surgery, a nurse monitors her heart rate, breathing, oxygen levels, blood pressure, and temperature. Cats are kept warm on a heated pad, because anaesthesia lowers body temperature. This monitoring is continuous, not occasional, and it is one of the reasons modern spay surgery is so safe.
4. Shaving and cleaning the surgical site
The surgeon shaves a patch of fur on the belly, usually just below the belly button, or on the left flank in some techniques. The skin is then scrubbed with surgical antiseptic. You may be surprised by how large the shaved patch looks compared with the small incision — that is normal, and the fur grows back within a few weeks.
5. The incision and removal of the organs
The surgeon makes a small incision through the skin and abdominal wall, usually 2 to 4 centimetres long. Through it, they locate the ovaries and uterus, tie off the blood vessels supplying them with sutures so there is no bleeding, and remove the organs. The surgeon then checks inside the abdomen for any bleeding before closing. The whole surgical part typically takes 20 to 45 minutes, depending on the cat’s size, age, and whether she is in heat or has had kittens before.
6. Closing the wound in layers
The wound is closed in layers, not just on the surface. The abdominal wall is stitched, then the tissue under the skin, then the skin itself. Skin closure may be stitches you can see, stitches buried under the skin that dissolve on their own, surgical glue, or a combination. Your vet will tell you which type your cat has and whether any stitches need removing in 10 to 14 days. Many modern spays use dissolvable stitches, so no return visit is needed just for stitch removal.
7. Waking up and going home
After surgery, your cat is moved to a quiet recovery area where the anaesthetic is allowed to wear off under supervision. She will be groggy, wobbly, and possibly a little cold or confused — all normal. Most cats go home the same afternoon, once they are awake enough to lift their head and swallow. Your clinic will call you when she is ready, and you will go home with written aftercare instructions and usually a few days of pain medicine.
Spay day at a glance
| Time | What happens |
|---|---|
| Night before | Food withheld (usually 8–12 hours); cat kept indoors. |
| Morning drop-off | Health check, weight, heart and lung check. |
| Late morning | Sedation, pain relief, anaesthesia, surgery (20–45 minutes). |
| Early afternoon | Recovery monitoring while anaesthesia wears off. |
| Afternoon | Phone call that she is ready; go-home instructions and pain medicine. |
| Evening at home | Quiet room, small amount of water, then a little food if she wants it. |
Flank, Midline, and Laparoscopic: Which Approach Will Your Vet Use?
The approach describes where the incision is made and how the surgeon works. All three approaches below achieve the same result, and the best one is usually the one your vet is most experienced with.
| Approach | Where the incision is | Pros | Cons |
|---|---|---|---|
| Midline (belly) | Under the belly, just below the belly button | Most common; easy access to both ovaries and uterus; easiest to check the abdomen | Incision sits where the cat can reach it more easily, so a cone is often needed. |
| Flank (side) | Left side of the belly | Wound is harder for the cat to reach and lick; sometimes no cone needed | Slightly less access if anything unexpected is found inside. |
| Laparoscopic (keyhole) | Two or three tiny incisions with a camera | Smallest wounds, often less post-operative pain, faster return to activity | More expensive; needs special equipment and training; not offered everywhere. |
There is no need to shop around for a particular approach unless your vet raises a reason. A straightforward midline or flank spay by an experienced surgeon is an excellent, proven operation. Laparoscopic spaying is a genuine refinement, not a necessity, and its main benefit is smaller wounds rather than a different outcome.
How Much Does Spaying a Cat Cost?
Cost is one of the first things owners ask about, and it varies a lot by where you live and what kind of clinic you use. The surgery itself is only part of the bill: anaesthesia, monitoring, pain relief, and aftercare are usually bundled in, but bloodwork, a cone, and take-home medicine may be added.
| Clinic type | Typical price range | What is usually included |
|---|---|---|
| Low-cost spay clinic or shelter programme | $50–$150 | Surgery, anaesthesia, basic pain relief; bloodwork often extra. |
| Standard veterinary practice | $200–$400 | Surgery, anaesthesia, monitoring, pain relief, go-home medicine. |
| Veterinary hospital or city practice | $300–$600+ | As above, plus pre-anaesthetic bloodwork and sometimes a longer stay. |
| Laparoscopic spay | $400–$800+ | Keyhole surgery with camera equipment; premium pricing. |
Prices in the UK typically run £80 to £250 at a standard practice, with charity schemes much lower. If cost is a barrier, ask your vet about payment plans, local low-cost clinics, and charities such as the RSPCA, Cats Protection, or the ASPCA in the US, all of which run subsidised spaying schemes. The cheapest safe spay is far better than no spay: one unspayed female and her offspring can theoretically produce dozens of kittens in a few years, and shelters are already full of them.
When comparing quotes, compare like with like. A quote that looks cheap but excludes pain relief, monitoring, or a cone is not the same as a quote that includes them. Ask one question before you book: “Does this price include anaesthesia monitoring, pain relief to take home, and a follow-up check?” That tells you almost everything about what you are actually buying.
Recovery Day by Day: What to Expect at Home
Recovery is mostly about rest, and most cats recover smoothly. The first day looks worse than it is — a groggy, wobbly cat who does not want food is normal — and improvement is usually fast after that.
| Day | What is normal | What to do |
|---|---|---|
| Day 0 (surgery day) | Groggy, wobbly, sleepy, small appetite, may not want water at first | Quiet room, offer a little water, then a small meal; keep her indoors; give pain medicine as directed. |
| Days 1–2 | Eating and drinking again, moving slowly, wound looks clean, may hide more than usual | Keep her calm, no jumping or rough play, check the wound twice a day. |
| Days 3–5 | Energy returning, appetite normal, wound starting to heal | Still no running, jumping, or outdoor roaming; cone or suit stays on if she licks. |
| Days 7–10 | Looks almost normal, wound mostly healed, stitches dissolving or ready for removal | Follow-up check if your vet asked for one; stitches removed if non-dissolvable. |
| Days 10–14 | Fully recovered for most cats | Normal activity resumes once the vet confirms the wound is healed. |
A few practical rules cover almost everything. Keep her indoors for the full 10 to 14 days, because outdoor roaming risks wound damage and infection before healing is complete. Do not bathe her or let the wound get wet until the vet says it is healed. Do not let her lick the wound — licking is the single most common cause of wound problems, and it is why cones and recovery suits exist. If she hates the cone, a soft inflatable collar or a baby-grow style recovery suit often works better, but something must protect the wound. And keep other pets from grooming the wound too, even if they mean well.
Appetite deserves a special note. Some cats eat very little on surgery day and then eat normally the next day. If she still refuses food after 24 hours, vomits repeatedly, or seems in obvious pain despite her medicine, call the clinic. Those are not wait-and-see symptoms.
Warning Signs After a Spay: When to Call the Vet
Most spays heal without any trouble, but knowing the warning signs means you can act early on the rare occasion something goes wrong. Call your vet promptly if you notice any of the following.
- Wound opening, swelling, or discharge. A little mild swelling in the first day or two can be normal, but a wound that opens, leaks pus, smells bad, or swells suddenly needs attention the same day.
- Bleeding from the wound. A few drops in the first hours are not unusual, but ongoing bleeding is not.
- Refusal to eat for more than 24 hours, or repeated vomiting. These can signal pain, nausea, or a complication, and they need a vet’s judgement, not just waiting.
- Extreme lethargy beyond the first day. Sleepiness on surgery day is expected. A cat who is still flat, unresponsive, or hiding and refusing to move on day two or three is not.
- Fever, pale gums, or laboured breathing. These are urgent signs — call the clinic immediately or use an emergency vet if it is out of hours.
- A hard lump under the wound. A small, soft lump can be normal tissue reaction to internal stitches and usually settles on its own, but a hard, painful, or growing lump should be checked.
Internal bleeding after a spay is rare, and it is one of the reasons the surgeon ties off blood vessels so carefully and monitors the cat before sending her home. The most common post-spay problem by far is much more ordinary: the cat licks the wound open. That is frustrating but fixable, and it is exactly why the cone rule matters even when your cat looks perfectly fine.
Benefits of Spaying Beyond Preventing Kittens
Preventing unwanted litters is the headline benefit, but it is not the only one, and for many owners the health and behaviour benefits are what tip the decision.
- No heat cycles. A female cat in heat can yowl loudly for days, roll and posture constantly, try to escape outdoors, and attract unneutered males to your garden. Spaying ends all of that permanently.
- No risk of pyometra. This uterine infection is common in older unspayed cats, can become life-threatening quickly, and its emergency treatment is a spay under much worse conditions. A planned spay removes the risk entirely.
- Much lower mammary cancer risk. Spaying before the first heat gives the greatest protection against mammary tumours, most of which are malignant in cats.
- No spraying or roaming driven by heats. Unspayed females are less likely to spray than males, but heat-related restlessness and escape attempts disappear after spaying.
- A calmer household and fewer strays. Every litter prevented is a litter that does not end up in a shelter. Shelters in the US and UK take in millions of cats a year, and most of them arrive because of unplanned litters.
One myth deserves a direct answer: a cat does not need to have one litter before being spayed, and having a litter confers no health benefit. That idea has been around for generations, but veterinary evidence does not support it. Spaying before the first heat is the healthier choice.
What to Ask Your Vet Before Booking
A short conversation before the appointment prevents almost every surprise. If you only ask five things, make them these.
- What does the quoted price include? Anaesthesia monitoring, pain relief to take home, bloodwork, a cone, and a follow-up check can each be included or extra.
- Will she have dissolvable stitches or stitches that need removing? This tells you whether a return visit is needed in 10 to 14 days.
- What pain relief will she go home with, and for how many days? Modern spays should include take-home pain relief, not just an injection on the day.
- Should she have pre-anaesthetic bloodwork? It is routine for adults and seniors and sensible for any cat with a health history.
- What should I do if she licks the wound or refuses food? Knowing the clinic’s out-of-hours number before surgery day is far better than searching for it at midnight.
Also mention if your cat is in heat, may be pregnant, has had kittens before, or takes any medicine. None of these are reasons to avoid spaying, but they change the plan slightly, and your vet would rather know in advance.
Frequently Asked Questions About Spaying a Cat
How long does it take to spay a cat?
The surgery itself usually takes 20 to 45 minutes. The whole clinic visit takes most of the day, because of the morning health check, anaesthesia, surgery, and supervised recovery before she is ready to go home in the afternoon.
Is spaying a cat painful?
She feels nothing during the operation because she is under general anaesthesia. Afterwards, she will have pain relief, and most cats are comfortable within a day or two. She may be quiet and less active for a few days, which is her body healing, not necessarily a sign of unmanaged pain — but if she seems in obvious pain despite her medicine, call the clinic.
How long does a cat take to recover from being spayed?
Most cats are back to normal within 10 to 14 days. They are usually eating and moving normally within two to three days, but the wound needs the full two weeks to heal properly, which is why activity is restricted for that long even when she looks fine.
Can a cat be spayed while in heat?
Yes. Spaying during heat is safe, though the tissues are more swollen and the surgery may take a little longer and cost a little more. Vets will discuss this with you. If your cat has come into heat, book the appointment rather than waiting months for the “perfect” time.
Will spaying make my cat fat?
Spaying lowers calorie needs slightly, and weight gain after spaying is common but not inevitable. It happens because owners keep feeding the same amount to a cat who now needs less, not because of the surgery itself. Adjusting portions and keeping play regular prevents it.
Does a spayed cat still go into heat?
No. Without ovaries, there are no hormones to drive a heat cycle. If a spayed cat shows heat behaviour, it is rare and usually means a tiny piece of ovarian tissue was left behind, a condition called ovarian remnant syndrome. It is uncommon and your vet can investigate it.
Can a spayed cat still get pregnant?
No. With the ovaries and usually the uterus removed, pregnancy is impossible. A spayed cat cannot have kittens, which is the whole point of the operation.
Do cats need a cone after being spayed?
Most cats do, for 10 to 14 days, because licking is the most common cause of wound problems. If your cat tolerates a cone badly, a recovery suit or inflatable collar is often a good alternative — but the wound must be protected somehow, even if she seems uninterested in it at first.
The Bottom Line
Spaying a cat is a short, routine operation with a long list of benefits. A vet removes the ovaries and usually the uterus under general anaesthesia, closes a small belly wound in layers, and sends your cat home the same day with pain relief and simple aftercare instructions. Two weeks of indoor rest and wound protection, and she is done — no more heats, no unwanted litters, no risk of uterine infection, and a much lower risk of mammary cancer.
If you have been putting it off, the best next step is a simple one: call your clinic, ask the five questions above, and book the appointment. Your cat will sleep through the operation, recover in days, and never know the difference — except that she will never have to go through a heat cycle again.
This article is for general information only and is not a substitute for veterinary advice. If your cat is unwell, in heat, pregnant, or has a health condition, talk to your veterinarian about the best timing and plan for her spay.
