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Dog Pregnancy Due Date Formula:
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The T4 Ligation Calculator estimates the due date for pregnant dogs based on the mating date. The standard canine gestation period is approximately 63 days from the date of mating.
The calculator uses the simple formula:
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Explanation: The calculation adds exactly 63 days to the mating date to estimate when the dog will give birth.
Details: Knowing the expected due date helps prepare for whelping, schedule veterinary checkups, and monitor the pregnancy for any complications.
Tips: Enter the exact mating date for most accurate results. While 63 days is average, normal gestation can range from 58-68 days.
Q1: How accurate is the 63-day calculation?
A: It's an average - actual gestation can vary by ±5 days depending on breed, litter size, and individual factors.
Q2: When should I start monitoring for labor signs?
A: Begin close monitoring from day 58 onward. Take rectal temperature twice daily as a drop below 99°F often precedes labor by 12-24 hours.
Q3: What if I don't know the exact mating date?
A: Ultrasound can estimate gestational age if the mating date is unknown. Early ultrasound (days 25-35) is most accurate for dating.
Q4: Are there breed variations in gestation length?
A: Smaller breeds tend to have slightly shorter pregnancies while larger breeds may go longer, but 63 days remains a reliable average.
Q5: When should I contact my vet?
A: If no signs of labor by day 65, if active contractions last >2 hours without puppies, or if >4 hours pass between puppies.