Fig. 1

Effects of KF supplementation on insulin resistance and reproductive performance of sows. A Intravenous glucose tolerance test (GTT) from 0 to 120 min and area under the curve (AUC) of glucose from 0 to 120 min in GTT. (n = 6) B Fasting blood glucose level (FPG) (n = 6). C Fasting blood insulin level (FPI) (n = 6). D The values of homeostasis model assessment-insulin resistance (HOMA-IR) (n = 6). E Average piglet weight (n = 20). F Placental efficiency (n = 20). G Total born piglet (n = 20). H Stillbirth rate (n = 20). All data represent the mean ± SEM. Except that the stillbirth rate was tested by chi-square, the remaining data were statistically analyzed using the independent t-test. 0.05 < P < 0.10 indicated a statistical trend of change; *P < 0.05 and **P < 0.01