Enter the first day of bloody discharge and see what to expect, with the ranges.
If the first day of discharge was 1 October, the receptive phase (estrus) is likely to start around 10 October, though it can start anywhere from 4 to 18 October. It lasts about 9 days on average. The next season is expected about 7 months later, around 1 May, and can fall between March and September.
| Stage | Average | Range |
|---|---|---|
| Proestrus (swelling, bloody discharge) | 9 days | 3 to 17 days |
| Estrus (receptive to males) | 9 days | 3 to 21 days |
| Bloody discharge in total | usually 14 to 21 days | |
| Time between seasons | about 7 months | 5 to 11 months |
Count from the first day you saw it, not from swelling alone.
Enter the first day and the dates appear here.
This is general information and arithmetic. It is not veterinary advice. Speak with your vet about your own pet.
starts first day + 9 (range + 3 to + 17); ends first day + 18 at the averages
Proestrus averages 9 days, then estrus averages 9 days.
first day + 7 months (range + 5 to + 11 months)
Counted in calendar months from the first day of this season.
Ask a daycare or kennel about their policy for dogs in season before you book. Find a boarder or daycare that handles dogs in season.
