“…The MgSO4 treatment is influenced by body mass index (BMI) and its failure might be due to high BMI. 16,17 The patient in this case had BMI 31.2 kg/m 2 before pregnancy, was classified as obesity grade II based on Asia Pacific criteria. Women with high BMI have lower circulating levels of Mg and it remains subtherapeutic up to 18 hours.…”