From Pig

Meishan are a breed of pig introduced into the United States under a cooperative effort of the USDA, the University of Illinois, and Iowa State University.

Meishan pigs are perhaps one of the most prolific breeds of pig in the world. They reach puberty at 2.5-3 months of age, achieve high embryo survival rates, and a large litter size of 15-16 pigs. It is quite common to have two litters per year. Third and later parities of this breed had 17.0 pigs born, with 12.9 being weaned. Their 240 day weight was 170.5 lbs., with an ADG of 0.75 lbs[2].