Case means form or variation.. Think of having a case of the flu: you are still yourself, but you are in a different form of yourself, so to speak, and you can only act in certain ways as a result of that state. Most Latin nouns, pronouns, and adjectives appear only in a limited number of different forms. For example, for the Latin word Ã¢la (wing), you will generally see only these forms: Ã¢la / Ã¢lae / Ã¢lam / Ã¢lÃ¢ / Ã¢lÃ¢rum / Ã¢lÃ®s / Ã¢lÃ¢s . Latin has several different boxes of endings.
And, cows that lose weight and body condition after calving have longer post-partum intervals. So with all that in mind, the postpartum interval, if conditions are ideal, for beef cows is between 50 and 60 days for an average of 55 days. First-calvers will be at least 10 days longer.
After the first heat, about 25 to 30% of cows have a short cycle. A normal cycle lasts 19 to 23 days in beef cattle. However, short cycles last only 12 to 15 days. During short cycles progesterone, the hormone that supports pregnancy, does not stay elevated for enough days to allow implantation to occur. In 70 to 80% of beef cows, there is a brief (2 to 8 day) increase in progesterone that occurs before the first heat (Figure 1).