Eleven studies conducted in women with HIV examined the association between Hb concentration and maternal mortality (n = 3), child mortality (n = 2), preterm birth (n = 2), SGA (n = 1), preeclampsia (n = 1), hemorrhage and transfusion (n = 1), and asymptomatic bacteriuria (n = 1). The gene discussed is GSTM1; the disease is preeclampsia.