There are eight major breeds of swine that are commonly raised in the United States. Different breeds are better used for specific applications. Producers typically raise breeds that best fit their needs based on its qualities and physical characteristics.
Berkshire, Chester White, Duroc, Hampshire, Landrace, Poland China, Spotted,
and Yorkshire.
https://porkcheckoff.org/pork-branding/facts-statistics/major-swine-breeds/
Life Cycle of a Market Pig The life cycle of a market pig lasts about 25 to 28 weeks or between six and seven months. They typically weigh 2 to 3 pounds at birth and are nurtured to their market weight of up to 280 pounds.
Sows are pregnant for three months, three weeks and three days. That is 115 days, with a range of 111 to 120 days, from the first day of mating. Piglets born before 109 days are classed as abortions. Any piglets born between 109 and 112 days are classed as a premature farrowing.
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