Cat Pregnancy Due Date Calculator
Determine the expected due date and key pregnancy timeline milestones for your cat (queen) based on mating or ovulation dates.
Input Parameters
Enter mating date.
Estimated Due Date
KEY MILESTONES
Veterinary Tip
Provide high-calorie kitten food to pregnant cats starting around week 6 to meet increased energy demands for fetal growth and milk production.
Cat Pregnancy Timeline & Fetal Milestone Chart
| Week & Day | Fetal & Physical Milestone | Care & Clinical Recommendations |
|---|---|---|
| Week 1 (Days 1–7) | Fertilization occurs; eggs travel to uterine horns. | Keep routines stress-free. Maintain normal high-quality diet. |
| Week 3 (Day 21) | Nipples enlarge and turn bright pink ("Pinking-up"). | Schedule vet palpation or ultrasound scan. |
| Week 5 (Day 35) | Abdomen visibly enlarges; weight gain accelerates. | Gradually transition queen to growth/kitten food. |
| Week 7 (Day 49) | Kitten movements palpable through flanks. | Prepare quiet nesting box with warm blankets in a low-traffic area. |
| Week 9 (Days 63–65) | Queen stops eating, begins pacing/nesting; temperature drops. | Keep emergency vet numbers ready; monitor stage 1 labor. |
Calculation Methodology & Biological Principles
Feline Gestation Formula
Cats are induced ovulators. Gestation averages 63-65 days from mating date. Developmental milestones (Pinking up at Day 21, Nesting at Day 61) project based on standard gestational scaling.
Veterinary Disclaimer
Estimates serve guidance purposes only. Always consult a veterinarian for prenatal care, ultrasound verification, or if labor exceeds 67 days.
Frequently Asked Questions
How long is a cat pregnant (feline gestation period)? ▼
A cat's gestation period averages 63 to 65 days (approx. 9 weeks), with a normal safe delivery window between 61 and 67 days from mating.
What is 'pinking up' in pregnant cats? ▼
Around Day 21 of pregnancy, a queen's nipples become noticeably enlarged, firmer, and turn a bright pinkish color. This is called 'pinking up' and is often the first visible physical sign of feline pregnancy.
How can a vet confirm cat pregnancy? ▼
A veterinarian can palpate abdominal uterine swellings between Days 20 and 30, perform an ultrasound after Day 25 to detect fetal heartbeats, or take an X-ray after Day 45 to count kitten skeletons.