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🐕 Dog Heat Cycle and Breeding

A 3D hormone-level simulator charting the canine heat cycle stages with an animated timeline and fertility-window indicator that updates as users scrub through the cycle.

Animals & Their World3DAdvanced60 FPS

A glowing ring timeline traces a female dog's estrous cycle stage by stage, with three hormone ribbon graphs — estrogen, the LH surge, and progesterone — rising and falling in height as a dog marker walks the track, while a bright band highlights the fertile window.

🔬 What It Demonstrates

How estrogen, LH, and progesterone rise and fall across proestrus, estrus, diestrus, and anestrus, and why the true fertile window sits just after the LH-triggered ovulation rather than at the start of visible heat.

🎮 How to Use

Scrub the cycle-day slider or press play to watch the dog and hormone levels move together. Switch breed size to see how the interval between heats stretches from small to giant breeds.

💡 Did You Know?

Because sperm can survive in the reproductive tract for up to a week, a dog can be bred several days before her fertile window opens and still conceive — which is why timing by hormone tests beats timing by behaviour alone.

⚙ Under the hood

A 3D hormone-level simulator charting the canine heat cycle stages with an animated timeline and fertility-window indicator that updates as users scrub through the cycle.

dogsreproductionbreedingheat cyclehormonesanimal scienceThree.js

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install