Normally a cow should push out the placenta a few minutes to 48 hours after giving birth. Any longer, such as 10 days, would be considered "retaining of the placenta." If a cow retains her placenta, DO NOT PULL IT OUT!! Contact the vet to get some hormone such as oxytocin or something similar to encourage her uterus to contract and push the placenta out. If you pull it out you will cause metritis or uterine infection, which is NOT good for your cow.
The time it takes varies, but cows usually shed the placenta within 2 to 8 hours after birth. If they do not within 36 hours, they usually will not shed for 7 to 10 days.
Anywhere from 5 to 10 hours. Any longer she will have to see a vet.
A cow's gestation period is 9 months.
A "cow" is a cow when that "cow" is a she and she has given birth to at least one calf.
A cow
Nothing, obviously. The calf isn't born yet. Just let Nature take its course and the cow will give birth soon.
A heavily pregnant cow, or a long-bred cow. Or, a cow that is expecting soon.
You cannot give birth to a cow. It's simply anatomically and genetically impossible.
A springer or springing cow.
No but soon
It should only be a matter of a couple hours.
It could mean that a cow is ready to give birth.
A pregnant cow who gives birth is a mother.
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A calving cow if she's in the process of giving birth (which is what freshening is referred to), or a new momma cow (or just plain new mother) if she's already given birth.