Economic result of a production system with primiparous sows

Gilts have finished their first cycle of reproduction before reaching the adult weight. Carcass value of primiparous sows should be closer to fattening pigs than to old sows. An experiment has proved that carcasses of primiparous sows which weaned less than nine piglets had a good meat quality.<br>Calculation of gross margin gave different results depending on herd types while calculation of profit was not depending on herd types. Net gain per sow and year in a herd with only primiparous sows was SFr. 700.- lower than in a conventional herd. In order to get the same net gain in both systems, slaughter price of primiparous sows should be similar to fattening pigs. Reduction of mating age would improve the economic result of the system with primiparous sows but could decrease meat quality.