Gestation Length
An easy way to remember the length of gestation in swine is the rule of threes: three months, three weeks and three days, for a total of 114 days. This is an average length; pigs born a couple of days early or late should be healthy. The gestation lengths can vary with each pregnancy, so don't worry if your sow delivers at exactly 114 days for one pregnancy and 116 days for the next pregnancy.