MTHFR and cervical carcinoma: At position 1,298 of MTHFR there is an A/C SNP with a similar biochemical effect but where the effects of the C allele are generally less severe, but evidence shows an association with increased cervical cancer risk (Yi et al., 2016) and reduced sperm counts in Asian (Aliakbari et al., 2020), Moroccan (Eloualid et al., 2012), and Indian (Singh et al., 2010) populations.