Rare, but probably happens more often than what is noticed.
Yes, both twins will be able to get bred and produce offspring.
From when?? From when she was last bred, when she had her last calf, when she showed heat after having her calf, or when she was bred after having her last calf?? Please be more specific so the question can actually be answered.
Don't do it. Twins are harder to manage and much more harder on a cow (unless she's producing a lot milk and can keep her body condition at normal) than raising a single calf. Often a momma cow will reject one twin and keep the other, which means you have to bottle-feed that other twin. If one out of every 5 cows did that and you had a 200-head cowherd, that is a LOT of bottle feeding to do! Twins are also smaller than a single calf, and thus market weights for twins are generally lower than that of a calf that has been born alone. Survivability for twins after calving is also lower than that of a single calf. So it's not worth the effort to try to breed cows to produce twins all the time.
A cow typically has one calf per year. They have a gestation period of 9 months, and usually have just one calf although they are known to have twins.
Assuming you are referring to a cow that is 20 years old, then the answer to this question would be around 18 calves, if she's never had twins in her life. This is because it takes two years for a female, from birth to her first parturition, to grow old enough to produce a calf. After she has had her first calf she is able to produce an average of one calf per year. The number may be higher if she has had twins in her lifetime.
Camels only have one calf at a time. Having twins is unheard of.
Yes, both twins will be able to get bred and produce offspring.
Mainly they have 1 calf per year. But sometimes they have twins (twins are rare!).
In most cows, the chance of a cow having twins is 0.1%. However, there are occasionally some cows that will calve twins all every season. Most cows, though, give birth to only one calf per calving season.
It doesn't work that way. A heifer calf is only infertile if she is twinned with a bull calf and if her and that bull calf share the same placental tissues. In most cases such twins are fraternal, but simply stating that fraternal twins versus maternal twins are more prone to infertility than the other is stating falsehoods.
Normally one calf, sometimes twins.
The cow shouldn't go for more than an hour between calving out twins, because there's a risk of the second twin suffocating due to the placenta detaching itself from the uterine wall. However, there is a chance that the second calf is a PATERNAL twin (not a maternal, as maternal twins ALWAYS share a placenta), and it could be some time, however rare, that the second calf will be born. Normally, though, twins usually follow soon after the other. Thus, the second twin should be within minutes after the first, so, if you suspect the cow has twins, you should get her in the head gate as soon as possible, glove up and go in to see if you can feel for another calf. If you do, quickly position the calf in the normal birthing position (if it isn't already), put the calving chains on, and start pulling. I'm sure your vet would tell you the same thing if he/she were asked that same question by you.
They usually only have one calf, twins can occur but are very rare.
Giraffes normally only have one calf at a time - twins are a rarity.
From when?? From when she was last bred, when she had her last calf, when she showed heat after having her calf, or when she was bred after having her last calf?? Please be more specific so the question can actually be answered.
about 4-5 babies Whales give birth to one calf at a time. Twins are very rare.
Don't do it. Twins are harder to manage and much more harder on a cow (unless she's producing a lot milk and can keep her body condition at normal) than raising a single calf. Often a momma cow will reject one twin and keep the other, which means you have to bottle-feed that other twin. If one out of every 5 cows did that and you had a 200-head cowherd, that is a LOT of bottle feeding to do! Twins are also smaller than a single calf, and thus market weights for twins are generally lower than that of a calf that has been born alone. Survivability for twins after calving is also lower than that of a single calf. So it's not worth the effort to try to breed cows to produce twins all the time.