1. What is the Dog Pregnancy Calculation?

This calculator estimates a dog's due date based on the ovulation date. The standard canine pregnancy lasts approximately 63 days from ovulation, but we subtract 2 days to account for the ovulation window.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• Ovulation Date — The known date of ovulation (from progesterone testing)
• 63 days — Standard canine gestation period from ovulation
• -2 days — Adjustment for typical ovulation window

3. Importance of Accurate Due Date

Details: Knowing the precise due date helps breeders prepare for whelping, schedule veterinary checkups, and monitor for potential complications.

4. Using the Calculator

Tips: Enter the ovulation date (determined through progesterone testing) to get the most accurate due date prediction.

5. Frequently Asked Questions (FAQ)

Q1: Why subtract 2 days from the calculation?
A: This accounts for the typical 2-day ovulation window when the exact day of ovulation isn't known.

Q2: How accurate is this calculation?
A: When based on confirmed ovulation date, it's very accurate (±1 day). Without progesterone testing, estimates are less reliable.

Q3: Can gestation length vary?
A: Yes, normal gestation can range from 58-68 days from ovulation, though 63 days is most common.

Q4: When should I start monitoring for labor?
A: Begin close monitoring from day 58, as some dogs may whelp earlier than the calculated date.

Q5: What if I only know the breeding date?
A: Breeding dates are less accurate for prediction as they may not coincide with ovulation.