Prospect study 174 SLE HCQ-Rx pts w/ whole-blood HCQ levels during pregnancy. 30 w/ flares(17%; 2.3% severe) & 28(16%) adverse preg outcomes. HCQ levels didnt predict APOs. BUT low (≤500) or no (≤200 ) HCQ levels assoc w/ severe maternal flares (9-13%) https://t.co/CHdd9Tuamk https://t.co/fFTr5MpiCx