SSB and Sjogren syndrome: Pregnant women with primary Sjogren’s syndrome (PSS) have a high incidence of maternal and fetal complications due to immunological variations caused by maternal antibodies (anti-Sjogren's-syndrome-related antigen A (SSA) and anti-anti-Sjogren's-syndrome-related antigen B (SSB) crossing the placenta from the 12th week of gestation, mediating the tissue damage.