Live Birth. After mating, females are pregnant for about seven months -- usually between 205 and 217 days. Instead of having a litter of several small babies like many mammals do, porcupines have one large baby. A baby weighs about a pound, typically ranging from 14 to 18 ounces. Their quills are soft when they're born, but the quills harden within an hour.
Fuel Cost. The cost of wood pellet fuel is usually given in dollars per ton; the average price of the fuel is typically around $250 per ton. The cost of a cord of wood, the fuel burned by a conventional wood stove, is around $200. The average home uses about 7.3 tons of pellet fuel or 6.5 cords of wood per season.
The cost for the insertion of pellets is between $230 and $500 depending on the dose of the hormone and the number of pellets needed. Men need a much larger dose of testosterone than women and the cost is higher. Pellets need to be inserted 2 to 4 times a year depending on how rapidly a patient metabolizes hormones. When compared to the cost of drugs to treat the individual symptoms of hormone decline, pellets are very cost effective.