Dog Heat Cycle Calculator

Track and predict your dogs heat cycle dates and fertile windows

🌡️ Dog Heat Cycle Calculator

Track and predict your dog's heat cycle dates and fertile windows.

Date of Last Heat Start

Dog Size

Age of Dog

📋 Heat Cycle Stages

Stage	Duration	Signs
Proestrus	7-10 days	Swelling, bloody discharge, attracts males but rejects mating
Estrus	5-14 days	Fertile window! Lighter discharge, receptive to males
Diestrus	60-90 days	No longer receptive, hormones settling
Anestrus	Varies	Resting phase until next cycle

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