Herd size, as defined by the number of bulls required to breed the cows, is of primary concern. The inventory of cows is a secondary consideration. To efficiently implement rotation or terminal sire systems minimally requires the use of two to six bulls. Composite breeds are appropriate for herds that require only one bull. If artificial insemination is feasible, then efficient use of bulls is not a concern and more complex crossbreeding systems can be implemented with fewer cows.
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A Beginner's Guide to Healthy Pregnancy. If you suspect, or know, that you are pregnant, we ho pe you have already visited your doctor. Presuming that you have confirmed your suspicions and that this is your first child, or that you wish to take better care of yourself d uring pregnancy than you did during your other pregnancies; you have come to the right place.