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.
The gestation period of a mini cow is around 285 days, which is the same length for a full-sized cow.
Zebu cows usually have quite a long gestation period, which can stretch from 290 to 300 days in length.
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.
A cow's gestation period is around 9 months, or approximately 283 days. A calf typically weighs between 60 to 100 pounds at birth, depending on the breed of the cow.