according to http:/wwwzperiodzcalzperiodznet/~pamgreen/length_of_estruszperiodzhtml about 3-4 weeks
Estrus in a cow or heifer only lasts for ~24 hours.
21 days
mate
9 weeks to 2 months
Same amount for a beef cow: estrus is around 24 hours. Estrous is 21 days long.
Dogs don't have "periods", the enter into estrus when they are in season and there is some bleeding during that time. When they are ready to breed, the bleeding stops and then will start up again. Estrus lasts about 3 weeks about twice a year.
2
The smaller breeds of dogs tend to have their first estrus cycle at an earlier age, while the large and giant breeds of dogs may not come into heat for the first time until they reach eighteen months to two years of age
yes
Mice are in estrus for a period of about 10 to 12 hours, and they will go into estrus every 3 or 4 days.
The length of estrous for cattle is approximately 21 days. The estrus period last about 18 hours.
2 months.