[Causal relationship between relative abundance of gut microbiota and teratozoospermia: A two-sample Mendelian randomization analysis].

The class Erysipelotrichia, family Erysipelotrichaceae, family Streptococcaceae, genus Coprococcusl, genus Ruminococcaceae UCG009, genus Streptococcus, order Clostridialesm and order Erysipelotrichales are one of the causes of teratozoospermia, related to the increased risk of the condition, while the family Porphyromonadaceae has a protective effect on sperm morphology, reducing the risk of teratozoospermia.