For a tiger, the gestation period averages around 100 days.
For a cow, the gestation period averages around 285 days.
The gestation period of a Gelbvieh cow averages around 260 to 280 days long.
Charolais tend to have a long gestation period, which is around 287 to 293 days long.
The gestation period of a Dutch Belted is around 285 days long.
The gestation period of a Red Pol cow is around 285 days long, plus or minus a few days.
A cow that is close to calving, and is far along in her gestation period.
The cow has the longest gestation period of the two species: A dog is pregnant for around 60 days, whereas a cow is pregnant for around 285 days.
Zebu cows usually have quite a long gestation period, which can stretch from 290 to 300 days in length.
The gestation period of a mini cow is around 285 days, which is the same length for a full-sized cow.
The gestation for a cow that's been AI'd would have the same gestation period as a cow that has been naturally bred: around 285 days, plus or minus. Artificial Insemination does NOT affect the length of gestation of a cow, it only affects what her offspring is going to be.
The gestation period for a female American bison is 9.5 months.
The inclusion of the Angus bull is irrelevant to this question since the bull has no control nor part in the length of a cow's gestation period. Expect a Hereford-cross cow to have an average gestation period of around 285 days long, plus or minus a few days.
The word "incubation" directly refers to the time an egg needs to be kept warm before it hatches. Since cows do not lay eggs, they do not have an incubation period. They have what is called a "gestation" period. This gestation period is generally 285 days long.