A cow that has NEVER had a calf in her lifetime is called a Heifer. A cow that has not had a calf YET is a heavily pregnant or heavy-bred, or a short-bred or long-bred cow. A cow that has not had a calf during a calving season is called a barren cow, an open cow, a cystic cow, a cull cow, a meat/slaughter cow, a poor cow, a free-loader, etc.
Yes. "Barren" is just another word for open, or not pregnant.
An "open" heifer is one that is of breeding age, and able to be bred. A "fresh" heifer is one that has recently given birth. A pregnant heifer is, well, pregnant (that's easy). A springing heifer is one who is nearing the end of her pregnancy, within a few weeks of giving birth. "Dry" is not milking and pregnant. "Close" would indicate 240 days pregnant or more. Note that the term has regional variations on the subtleties of it's meaning; so it's best to use it in the general sense only. For example, in many places "open" just means "not pregnant" and doesn't imply that she's ready to be bred.
You could call it a heifer, or a twin heifer if the sibling is also a heifer, or a freemartin if the heifer's sib is a bull calf.
Cow, first-calf heifer, bred heifer, heifer, heifer calf or spayed heifer. See the related question below.
The gender of a heifer is female.
A springing heifer is a heifer who is within a few weeks of delivering her first calf.
It's the name for a heifer that has had her first calf and is currently raising her first calf. It's also a name for a heifer that came from a heifer or cow that was that heifer or cow's first calf.
Like this:"The farmer had a prized heifer in the cattle shed.""The heifer was bred by the herd bull yesterday.""The cow gave birth to a heifer calf!""Those blasted heifers got out again!!"
That all depends on the age of the heifer. The older the heifer, the heavier she'll be.
A heifer is a young female cow.
She can also be known as a heifer calf, heifer yearling (if she is a year old), or first time heifer (if she has given birth to her first calf).