(1) gilts over 8 months old are not estrus. (2) Weaned sows had no estrus during the two love periods (42 days) or 2 months. (3) The second consecutive sow, accumulatively three habitual abortions during pregnancy. (4) The recurrence of the sow after mating is more than two consecutive times. (5) The first and second live litters of young sows have less than 7 litters. (6) The total number of litters per month of live piglets for all three litters was 7 or less. (7) The sows whose sows have two consecutive births and accumulated three births of suckling pigs have a survival rate of less than 60%, as well as sows with poor lactation, biting, and often difficult labor. (8) More than 7 parity sows and cumulative live births with fewer than 9 live litters. (9) Reserve boars older than 10 months old cannot be used. (10) The boar was not qualified for two consecutive months of semen testing (a problematic weekly fine). (11) Pigs with congenital genital diseases. (12) Breeding pigs in which the common disease can continue to be treated for two cycles and cannot be recovered. (13) Breeding pigs with severe infectious diseases. (14) Breeding pigs that have lost use value due to other reasons. Gauze Sheet,100%Cotton Gauze Sheet,Medical Gauze Swabs Sheet,Disposable Gauze Swabs Shaoxing Weijian Medical Supplies Co.,Ltd. , https://www.wetourmedical.com
Breeding principle