PLOD1 and COVID-19: FSH:LH (RR = - 0.38; 95% CI - 0.86, 0.11; P = 0.13), the ratio of FSH:LH decreased in COVID-19 group compared with control group, but the difference was not statistically significant.<h4>Conclusions</h4>COVID-19 can affect the level of sex hormones, especially T, which may further affect male fertility.