It is best to choose to breed in April-May, and to breed again in September-October, and repeat the cycle so that the sows can be bred in the spring and autumn to avoid cold and hot winter and summer conditions. Under normal circumstances, from 19 hours to 30 hours after the estrus, the swollen vulva of the sow just begins to subside, and a fibrillar mucus flows out. When the sow is hindquartered, it is timely and mated, and the first-time sows are born. To start breeding at 7 months to 8 months of age and weighing more than 100 kg.
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