a decreasing trendP < 0.05
Potential pro-inflammatory bacteria Bacteroides , Turricibacter , Clostridium and Desulfovibrionaceae showed a decreasing trend ( P < 0.05), among which the relative abundance of Bacteroides and Desulfovibrionaceae showed an obvious downward trend from the 9th week to the 15th week ( Fig 3I–3L ).