A child born to a married woman is presumed under common law to be the child of her husband by a presumption of paternity or presumption of legitimacy.
The behaviour of cows and heifers after they have conceived is one of the best non-invasive means of determining pregnancy in cattle. Simply put, pregnant cattle will not (or should not) come into estrus or heat for the entire duration of the 9.34-month (285 day) gestation period.
For as long as you would milk a cow that just had her calf. It usually takes about 10 to 15 minutes to milk out a cow (sometimes longer, especially with a cow with a huge udde â¦ r like a Holstein).