Complements that are low in #SLE pregnancy have POORER fetal outcomes. What happens to C3 & C4 in pregnancy? They should ⬆️ by 28% C3, 11% C4 in 1st Trimester ⁦@RheumNow⁩ #EULAR2021 POS0103. So order C3&C4 early in pregnancy in SLE & follow! https://t.co/FpHHj74e43