The relationships between triclosan (TCS) and sperm concentration and percent of normal morphology sperm among Chinese men (471) recruited during November 2013–March 2014. The x-axis refers to natural logarithm-transformed urinary TCS level corrected by creatinine concentration (Ln_TCSCRE); They-axis refers to natural logarithm-transformed sperm concentration (Ln_concentration) (a) and percent of normal morphology sperm (Ln_Pnormorph) (b). The red line is fitted by generalized additive model showing the relationship between x and y axes. The two blue lines refer to 95% confidence intervals. All models were adjusted for age, BMI, abstinence period, education, income, current smoking, drinking and exposure to other chemicals or heavy metals.