When a cat becomes pregnant, it marks the beginning of an exciting journey leading to the birth of adorable kittens. Understanding the stages of pregnancy for cats is crucial for ensuring a healthy pregnancy and delivery. A cat’s pregnancy, also known as gestation, lasts about 63-67 days (roughly 9 weeks) and is divided into different developmental stages.
In this article, we will provide an in-depth week-by-week breakdown of pregnancy stages in cats, including the physical and behavioral changes that occur, as well as how to care for a pregnant cat at each stage.
Stages of Pregnancy for Cats: Week-by-Week Breakdown
A cat’s pregnancy is divided into three trimesters and spans approximately 9 weeks. Each week brings significant changes in the growth and development of the kittens inside the mother’s womb.
Week 1: Fertilization and Early Development
- Pregnancy begins when a female cat (queen) mates with a male and ovulation occurs.
- The fertilized eggs travel to the uterus, where they implant in the uterine lining.
- No visible signs of pregnancy appear at this stage.
Week 2: Embryo Formation
- The fertilized eggs develop into embryos and attach to the uterus.
- Hormonal changes start to take effect, but external signs of pregnancy are still minimal.
- Some cats may show mild morning sickness or slight behavioral changes.
Week 3: Early Pregnancy Symptoms
- The embryos continue developing, and hormonal changes may cause:
✅ Slight increase in appetite
✅ Mild morning sickness (vomiting in some cats)
✅ Nipples begin to enlarge and turn pink (a phenomenon called “pinking up”) - Your veterinarian can confirm pregnancy with an ultrasound scan at this stage.
Week 4: Kitten Development Begins
- The embryos have now developed into fetal kittens with tiny spinal cords and limb buds.
- A vet can detect fetal heartbeats using ultrasound.
- The mother cat’s abdomen starts to swell slightly, but it may not be noticeable in first-time pregnancies.
- Pregnant cats often become more affectionate or start seeking quiet spaces.
Pregnancy Stages in Cats: Mid-Gestation (Weeks 5-6)
Week 5: Rapid Fetal Growth
- The kittens’ facial features and limbs begin forming.
- The queen’s belly becomes more noticeably swollen.
- Increased appetite as the mother requires more nutrition for fetal development.
- Avoid handling her belly too much to prevent stress.
Week 6: Kittens Develop Fur and Movement
- The kittens now have whiskers, claws, and fur growing.
- The mother’s weight increases significantly, and her belly becomes prominent.
- Nipples become larger and more visible.
- She may start nesting behaviors, such as looking for a comfortable birthing spot.
Pregnant Cats Stages: Final Weeks Before Birth (Weeks 7-9)
Week 7: Preparing for Birth
- The kittens continue growing and take up more space inside the uterus.
- The mother cat may become more restless and start spending time in quiet, secluded areas.
- Her appetite might increase further or decrease slightly due to discomfort.
Week 8: Signs of Approaching Labor
- The kittens are nearly fully developed and preparing for birth.
- You may notice:
✅ Milk production begins (nipples may leak colostrum)
✅ The cat becomes more affectionate or distant
✅ Increased nesting behaviors
✅ Restlessness or reduced appetite
Week 9: Labor and Delivery
- The kittens are now fully developed and ready to be born!
- Signs that labor is about to begin:
✅ Panting or excessive grooming
✅ Restlessness or pacing
✅ Frequent trips to the nesting area
✅ Contractions and visible straining
✅ Fluid discharge as labor begins
How to Care for a Pregnant Cat at Every Stage
✅ Provide High-Quality Nutrition: A pregnant cat needs protein-rich food formulated for kittens. Increase food portions in the final weeks.
✅ Minimize Stress: Keep the environment calm and quiet to reduce anxiety.
✅ Regular Vet Checkups: Ensure proper monitoring through ultrasounds and physical exams.
✅ Prepare a Nesting Area: Provide a warm, safe, and quiet place for labor and delivery.
✅ Watch for Complications: If labor exceeds 24 hours, or if your cat appears in distress, contact a veterinarian immediately.
Conclusion: Understanding the Pregnancy Stages in Cats
From fertilization to birth, a cat’s pregnancy progresses through distinct stages of pregnancy for cats, with noticeable changes in both the mother and her developing kittens. By understanding pregnant cat stages week by week, cat owners can ensure a smooth and healthy pregnancy.
Would you like more information on kitten care after birth? Let us know in the comments!
