Dog Heat Cycle Calculator
Track and predict your female dog’s heat cycles for better care and breeding planning.
Understanding Your Dog’s Heat Cycle
Proestrus (7-10 days)
Swollen vulva, bloody discharge. Male dogs will be attracted but female isn’t receptive yet.
Estrus (5-9 days)
Fertile period. Discharge lightens, female is receptive to males.
Diestrus (60-90 days)
Pregnancy or false pregnancy may occur. Hormones return to normal.
Anestrus (3-4 months)
Resting phase before the next cycle begins.
Dog Heat Cycle Calculator
