Calculadora de Ciclo de Cio da Cadela

The Dog Heat Cycle Calculator estimates the date of the next heat and the fertile window based on the last heat date. The estrous cycle of female dogs lasts on average 180 days (about 6 months), but can vary from 4 to 12 months depending on breed, age, and health. The tool uses the average interval to provide an approximate forecast, useful for breeding planning or female care.

The calculation is simple: add 180 days to the last heat date to get the probable next heat. The fertile window, when the female is most receptive to mating, corresponds to days 9 to 13 of the cycle (considering the first day of bleeding as day 1). This period is the most suitable for natural mating or artificial insemination, but ovulation can occur between days 2 and 21, depending on the animal.

Use this calculator if you are a breeder, veterinarian, or owner who wants to monitor the dog's reproductive cycle. It helps avoid unwanted pregnancies or plan matings. However, remember that the cycle can be affected by factors such as stress, diet, and illness. Observing physical and behavioral signs (vulvar swelling, bloody discharge, acceptance of the male) is essential to confirm the phase.

Important cautions: the interval between heats can be irregular, especially in young or older females. The calculator does not replace hormonal tests (progesterone measurement) or veterinary follow-up for precise ovulation determination. To avoid false pregnancies or health issues, consult a professional before making decisions based solely on the prediction.