Cat Labor Signs: How to Tell When Kittens Are Coming

Name: Cat Labor Signs: How to Tell When Kittens Are Coming
Creator: Dr. Zubair Khalid

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-10-02

When your cat is close to giving birth, the first signs of cat labor usually show up 12 to 24 hours before kittens arrive. She may become restless, stop eating, and start nesting in a quiet spot. Most cats handle birth on their own, but knowing what is normal helps you step in fast if something goes wrong.

This article is educational and is not a substitute for veterinary diagnosis or treatment.

Quick Answer

Nesting, restlessness, and hiding are often the earliest signs that labor is near.
A drop in rectal temperature below about 99°F (37.2°C) typically signals labor within 24 hours.
Stage 1 labor (cervical dilation and contractions) can last 6 to 12 hours before you see any kitten.
Clear or slightly blood-tinged vaginal discharge is normal. Green or foul-smelling discharge is not.
Call your vet right away if your cat strains hard for more than 20 to 30 minutes without producing a kitten, or if more than 2 to 4 hours pass between kittens.

What Are the Signs of Cat Labor?

Cats usually give birth (queen) without much drama. The tricky part is that early labor can look like ordinary discomfort. Here is what to watch for as the due date approaches.

Early Signs (12 to 24 Hours Before)

Nesting behavior. She may tear up blankets, paw at bedding, or crawl into closets and drawers.
Restlessness and pacing. She may walk from room to room and seem unable to settle.
Appetite loss. Many cats refuse food in the last day before labor.
Hiding. She may seek out a dark, quiet, enclosed space.
Vocalizing. Some cats become more talkative or cry softly.
Temperature drop. A rectal temperature below about 99°F (37.2°C) often means labor will start within 24 hours.

Signs of Cat Contractions

Contractions can be subtle at first. You may notice:

Rippling of the belly. The abdomen tightens and relaxes in waves.
Tail lifting and squatting. She may assume a crouched, straining posture.
Licking the vulva. This often accompanies contractions and the start of discharge.
Purring or deep breathing. Some cats purr through contractions as a self-soothing behavior.

Signs of Cat Labor Discharge

A small amount of clear, pink, or slightly blood-tinged discharge is normal as the cervix opens. If you see a greenish or blackish discharge before a kitten is born, that can indicate placental separation and warrants a call to your vet. A foul odor is also abnormal.

The Three Stages of Feline Labor

Stage 1: Preparation (6 to 12 Hours)

The cervix dilates and contractions begin, but they are mild. Your cat may be restless, pant, or seek solitude. You probably will not see a kitten yet. Keep the environment calm and dim.

Stage 2: Delivery of Kittens (Usually 5 to 30 Minutes per Kitten)

Active straining begins. Each kitten is usually delivered within 5 to 30 minutes of strong contractions. The mother breaks the amniotic sac, cleans the kitten, and often eats the placenta. Kittens may arrive headfirst or tailfirst, and both can be normal.

Stage 3: Delivery of Placentas

Each kitten has its own placenta, which usually passes within a few minutes after the kitten. If a placenta does not pass, your vet may need to intervene.

Step-by-Step: What to Do When You See Signs of Cat Labor

Set up a quiet whelping box. Place it in a warm, dim, low-traffic room. Line it with clean towels you can change easily.
Take her temperature twice daily in the last week of pregnancy if she tolerates it. A drop below 99°F (37.2°C) is a useful heads-up.
Keep the room warm. Newborn kittens cannot regulate their body temperature well. Aim for a draft-free space.
Stay nearby but hands-off. Most cats want privacy. Watch from a distance unless she seems distressed.
Count kittens and placentas. Knowing how many kittens were seen on ultrasound helps you know when she is done.
Have supplies ready. Clean towels, a bulb syringe, unwaxed dental floss, small scissors, a heating pad on low under a towel, and a scale for weighing kittens.
Call your vet if labor stalls. Do not wait hours if she is straining hard with no kitten.

Normal vs. Abnormal: A Quick Comparison Table

Sign	Normal	Call Your Vet
Discharge	Clear, pink, or slightly bloody	Green, black, or foul-smelling
Contractions	Mild at first, then strong	Strong straining over 20 to 30 minutes with no kitten
Time between kittens	Up to 2 to 4 hours	More than 4 hours with no progress
Temperature	Drops below 99°F before labor	Fever above 103°F
Behavior	Restless, nesting, hiding	Collapse, tremors, unresponsiveness
Kittens	Active, nursing within 1 to 2 hours	Weak, cold, or not nursing

When to Call the Vet: Red Flags

Some problems need immediate attention. Call your veterinarian right away if you see any of these:

Hard straining for more than 20 to 30 minutes with no kitten delivered.
More than 2 to 4 hours between kittens with strong contractions.
Green or black discharge before a kitten is born.
Foul-smelling discharge, which can suggest infection.
A kitten stuck in the birth canal. You may see part of a kitten protruding without progress.
Collapse, seizures, or heavy bleeding.
No kittens after 24 hours of active labor.
A retained placenta or a placenta that does not pass.
Fever above 103°F or signs of systemic illness.

A case report of a cat with a singleton pregnancy described lethargy, excessive thirst, loss of appetite, and bloody vaginal discharge over 48 hours before fetal death was confirmed [1]. That combination of signs is a clear reason to seek veterinary care the same day.

Common Mistakes Owners Make

Panicking during normal nesting. Restlessness and hiding are expected. Give her space.
Interfering too early. Do not pull on a kitten unless your vet tells you to.
Missing the temperature drop. A thermometer reading below 99°F (37.2°C) is one of the most reliable signs of cat labor.
Ignoring a stalled labor. Time matters. Prolonged straining can endanger the mother and kittens.
Forgetting to count placentas. Retained placentas can cause infection.
Skipping the postpartum vet check. Both mother and kittens should be examined after birth.
Letting kittens go too long without nursing. Newborns need colostrum and warmth quickly.

Supplies and Setup That Matter for Health

A clean, warm, quiet space reduces stress and infection risk. Here is what to prepare:

Whelping box with low sides so the mother can step in and out.
Clean towels you can wash and replace often.
Heating pad on low, placed under half the box so kittens can move away if too warm.
Kitchen scale to weigh kittens daily. Newborn kittens should gain weight steadily.
Bulb syringe to clear airways if needed.
Unwaxed dental floss and small scissors for tying and cutting cords only if the mother does not do it herself.
Notebook to record birth times, weights, and placentas.

After birth, keep the area clean and watch for signs of mastitis or metritis in the mother. If she seems painful, refuses to nurse, or has a fever, call your vet.

If you are also bringing a new kitten into a home with other cats, see Introducing New Kitten. If your cat shows signs of urinary discomfort after birth, read What Are The Signs That My Cat Has A Urinary Tract Infection and Signs Of A Urinary Tract Infection In My Cat.

Postpartum Care and Kittens

After delivery, the mother should pass all placentas and begin nursing. Kittens need warmth, colostrum, and frequent feeding. They should be weighed daily to confirm weight gain.

Kittens can generally be taken from their mother and littermates once they are weaned, beginning at 6 to 7 weeks old [2]. They need veterinary visits every 3 to 4 weeks until about 6 months old for shots and parasite treatment [2]. Maternal immunity from nursing can interfere with vaccines, so kittens are typically vaccinated starting at 2 to 3 months old [2]. Keep kittens away from unvaccinated cats until they have completed their vaccine series [2].

If your cat seems unusually anxious when separated from you or her kittens, see Cat Separation Anxiety: Signs and How to Help.

Limitations and When to Contact a Veterinarian

This guide covers typical labor, but every cat is different. Individual cases need a veterinarian who can examine your cat and make a diagnosis.

Call your veterinarian the same day if:

Your cat has a fever, foul discharge, or seems painful.
A placenta is retained.
Kittens are not nursing or gaining weight.
The mother seems depressed or refuses to eat after 24 hours.

Go to an emergency clinic now if:

She strains hard for more than 20 to 30 minutes with no kitten.
More than 2 to 4 hours pass between kittens.
You see green or black discharge before a kitten is born.
She collapses, bleeds heavily, or has seizures.

Schedule a routine visit if:

You want to confirm pregnancy and estimate the due date.
You need a postpartum check for the mother and kittens.
You have questions about vaccination timing or weaning.

Ultrasound can help estimate the delivery date. Measurements such as crown-rump length, biparietal diameter, and femur length are the most useful for predicting when a cat will give birth [3]. Hormone changes during pregnancy and lactation are also being studied to better understand feline reproductive stages [4]. Research on feline pregnancy continues to explore how the placenta and hormones interact [5].

Frequently Asked Questions

How long does cat labor last?

Stage 1 labor can last 6 to 12 hours before active pushing begins. Each kitten is usually delivered within 5 to 30 minutes of strong contractions, and the whole process from first contraction to last kitten can take several hours to a full day.

What does normal cat labor discharge look like?

Normal discharge is clear, pink, or slightly blood-tinged. It often appears as the cervix opens. Green, black, or foul-smelling discharge is abnormal and needs veterinary attention.

Can a cat have contractions without having kittens?

Yes. Early contractions can occur for hours before a kitten is delivered. If strong straining continues for more than 20 to 30 minutes without a kitten, call your vet.

How do I know when my cat is done having kittens?

She will usually relax, stop straining, and begin nursing and grooming the litter. Counting placentas and knowing how many kittens were seen on ultrasound helps confirm she is finished.

Should I stay with my cat during labor?

Stay nearby but give her space. Most cats prefer a quiet, dim area. Watch for red flags and be ready to call your vet if labor stalls.

References

Imaging diagnosis of intrauterine fetal death in a cat with singleton pregnancy. Topics in companion animal medicine, 2026.
Kitten Care - Cat Owners. Merck Veterinary Manual.
Ultrasound biometry for estimating delivery dates in small and medium breed cats. Theriogenology, 2025.
Hormonal trends during reproductive stages and ultrasonographic monitoring of gestational age in British Shorthair cats. Veterinary journal (London, England : 1997), 2025.
Establishment and Maintenance of Feline Pregnancy-A Comprehensive Review. Animals : an open access journal from MDPI, 2025.