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Dog Heat Cycle Calculator — Free Online Tool
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Dog Heat Cycle Calculator

Track heat cycle phases and predict your dog's next heat

Average Cycle Timeline: Proestrus lasts ~9 days (bleeding), followed by Estrus for ~9 days (fertile window). The average interval between heats is 6 months.
Heat Cycle Details

Cycle Timeline Results

⚠️ This calculator provides an estimated timeline based on averages. Actual heat cycles vary significantly by breed, age, and individual dog. For accurate breeding timelines, pregnancy prevention, or if your dog experiences irregular cycles, please consult your veterinarian.

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