That all depends on when they have been bred. A heifer bred at 15 months of age would calve when she's 24 months old. If she's bred later than that, she will always calve 9 months later.
22 months
It depends on the type of calf. A dairy bull calf will live up to or around 4 to 6 months before being slaughtered for veal. A beef steer will live up to around 2 years of age before being slaughtered. A heifer calf kept as a replacement (who will become a cow) will live anywhere from 5 to 20 years of age, depending on her productivity. A bull calf kept as a herd bull can live to about the same age of the heifer calf kept to become a cow.
Young heifers, as in heifers that are younger than 6 months of age, should NEVER be bred to calf, as this is much too young for them and too hard on their growing bodies. The youngest a heifer can be bred at is when they are 15 months old. Most heifers reach puberty by the time they are 11 or 12 months old, but shouldn't be bred until they are either 60% or 70% of the average weight of the main cowherd, or reach 15 months of age. Most of the time it is the weight that many cattle producers rely on for best calf production of the heifers, as sometimes a heifer that reaches 15 months of age is still too small to be bred.
Cows are born as baby calves, much like your mommy had you or your little brother[s] and/or sister[s]. A girl calf is called a heifer calf, and a boy calf is called a bull calf. The heifer calf is raised on milk from its mother, and then she no longer needs her milk when she reaches 6 months old. We can also get milk from her mother too, if she lets us. Her momma also stops making milk because her calf doesn't need it any more, but may keep producing for a little while longer if we want to have more. But then eventually she has to stop because she will be going to have another sister or brother to that little heifer soon! When the heifer reaches 1 year and a 5 or 6 months old, she is old enough to have a baby calf of her own. The baby calf grows in her belly for 9 months, then is born much like she was. She has many babies in her life, until she is too old to have any more. She can reach around 19 years old or even older. Nineteen is pretty old for a cow!
A heifer is young female bovine that has never given birth to a calf.A heifer may be considered a cow if:She successfully gives birth and raises her second calfShe reaches adult maturity at 4 years of ageSome people consider a heifer can become a cow after she gives birth to her first calf, but for many cattle producers she is merely considered a first-calf heifer, not a cow.
A heifer becomes a cow after she has had her first calf. In other words, you can expect 0 (zero) calves from a heifer over breeding life. When she is a cow, she may have from 1 to 18 calves in her lifetime.
Opposite gender of heifer (female) is bull (male).
A cow is pregnant, or 'in calf', for approximatly 40 weeks (9 months).
285 day gestation / 365 days a year = 0.781 years.
Get her in the head gate, glove up and reach inside to see if the calf's got something that is not in the normal position, or to feel if it's a really big calf that the heifer can't push through. If it's the latter, get the vet out ASAP. If it's anything of the former, you may be able to push the calf back in, put things right, and get the chains or the calf puller out and help pull the calf out. But it depends of what type of trouble as many things can go wong. Usually with a heifer the calf can be too big, then you gotta pull it out of her usually with a contraption called a calf puller. I would not attempt this without help from someone experienced, as you could kill one or both animals. A vet or a neighbor who's a veteran cattleman is a good source to get help from. It's more important to breed her to bull with history of siring small calves in the first place.
How ever many months it needs to carry that pointless life.
9 months