Suitable mating period for reserve sows

The suitable first mating age and weight of reserve sows vary with different breeds and feeding and management conditions. Generally speaking, early-maturing local varieties can be mated at the age of 6 to 8 months and weighing 50 to 60 kilograms, while late-maturing varieties should be mated at the age of 8 to 10 months, weight from 110 to 120 kilograms and the second estrus.