How the Breeding Window Planner works
Methodology
Displays days 9–14 after the entered first day of heat as a broad observation window, not a clinical ovulation prediction.
Frequently asked questions
Why is the window approximate?+
The onset and duration of estrus differ between dogs, and visible signs do not pinpoint ovulation.
Important veterinary note
Calculator outputs are estimates for education and planning. They do not diagnose disease, replace a physical examination, or override advice from a veterinarian who knows your dog.