🐱 Feline Obstetrics Model

Cat Pregnancy & Gestation Calculator

Calculate your pregnant queen's exact expected delivery window (63–67 days gestation) and generate a detailed veterinary timeline for ultrasounds, palpation, nesting, and labor onset.

1 Queen's Name (Optional)

Gestation Milestones for Your Queen
Expected Delivery Due Date

November 24, 2026

Safe Delivery Window: Nov 22 to Nov 26, 2026 (Days 63–67)

Current Gestation Progress: Day 0 of 65 (0%)65 days remaining until whelping

Key Feline Pregnancy Clinical Milestones

Days 15–20
Ultrasound Detection

Veterinary abdominal ultrasound can confirm embryonic vesicles and fetal heartbeats.

Days 21–28
Pinking-Up & Palpation

The queen's nipples enlarge and turn pink ("pinking-up"). A veterinarian can palpate distinct walnut-sized gestational sacs.

Days 35–42
Rapid Fetal Growth & Appetite Increase

Fetal skeletal organs form. Switch the queen gradually to high-protein, nutrient-dense kitten food.

Day 45+
X-Ray Kitten Count

Fetal skeletons calcify and become visible on abdominal radiography for an accurate kitten count.

Days 58–62
Nesting & Milk Production

Introduce the quiet nesting / queening box. Colostrum milk may appear in the mammary glands.

Days 63–67
Labor Onset & Queening

Rectal temperature drops ~1°C (to under 37.8°C / 100°F). Vocalization, pacing, and active contractions begin. Kittens are born every 15–60 minutes.

Veterinary Emergency Notice: If active hard labor contractions last longer than 60 minutes without a kitten being born, or if brownish/foul-smelling discharge occurs without delivery, contact an emergency veterinarian immediately.