Are you asking about how many days it will take the cow to come into heat after calving, or how many days is it between heat periods? For the former, it's 45 to 80 days. For the latter, it's ~21 days.
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.
Around the same length of time as a domestic cow: around 10 months.
Valbazin cannot be used on pregnant cows that are in their first 45 days of pregnancy, nor can it be used on breeding dairy females. If you have pregnant cows that are at least 45 days pregnant, yes, you can use it on your pregnant cows.
A heavily pregnant cow, or a long-bred cow. Or, a cow that is expecting soon.
A cow is pregnant, or 'in calf', for approximatly 40 weeks (9 months).
A pregnant cow who gives birth is a mother.
No, the cow will not go into estrus after she becomes pregnant.
Bred cow.
Talk to your cow. If she is pregnant your character will mention how see and her baby is doing. If your character does not mention a baby then your cow is not pregnant.
2 days
human sperm cannot get a cow pregnant. The only species humans can get pregnant with their sperm is another human.
An open or barren cow.