Adding the right amount of vitamins to sows' diets can eliminate the adverse effects caused by vitamin deficiency. Therefore, it is necessary to formulate the best recommended vitamin levels in practical production so that animal genetic potential can be fully utilized to protect the body's health. Economic benefits. B-vitamins during the breeding period are important coenzymes in the metabolic process of biochemical reactions. Biotin can reduce the interval from the weaning to the estrus of sows by participating in energy metabolism. It can also stimulate estrogen production and reduce the rate of non-estrus. Ovulation and post-development period sows do not have an estrous rate of up to 20% after the sow reaches the stage of development. Sows supplemented with 7.5 mg of vitamin B2 (riboflavin) per day may reduce the rate of non-estrus. At the same time, supplementation with biotin can increase the fertility rate of sows, especially for sows with longer intervals from weaning to estrus. Vitamin E acts primarily as an antioxidant to maintain the integrity of the cell membrane and prevent cell damage. Due to the high content of unsaturated fatty acids in sow diets, vitamin E needs to be added. Early folic acid can affect the survival of embryos and fetuses, and increasing the amount of folic acid can increase litter size. Folic acid is widely present in common feeds and has a high utilization rate. Folic acid not only affects animal metabolic rate and feed intake, but also plays an important role in controlling reproduction. Biotin in the fetus growth stage is the role of embryos in the uterine wall implantation, the placenta is a filter between the maternal and fetal blood system, it can choose the type and level of nutrients through the placental barrier, fetal growth after implantation It will rely mainly on the placenta for this filtering action to obtain nutrients. During the later period of sow pregnancy, the fetus grows very rapidly, so the demand for vitamins also rapidly increases. The vitamins supplied by the mother alone cannot meet the needs of fetal growth. The lack of vitamins in the fetus will lead to malformation or death. B vitamins are generally not stored in the mother's body and the fetus. They mainly act on the enzyme system. The fetus obtains vitamins through breast milk. The amount of vitamin B is related to the amount of vitamin B in the sow's diet. In late pregnancy, the uterine muscle tension is also considered in order to expand the uterus and accommodate the increased need for the fetus. Raw Sunflower Seeds,Plain Sunflower Seeds,Unroasted Sunflower Seeds,Raw Sunflower Wuyuan county dafeng oil food co.,ltd , https://www.sundafengfoods.com