pregnancies complicated by hemoglobin h disease

dear editor-in-chief the recent report on “the adverse effects of pregnancies complicated by hemoglobin h (hbh) disease” is very interesting (1). rabiee et al. reported a pregnant case complicated with hbh disease. indeed, this problem might not common in the middle east but it is very common in southeast asia. the authors hereby would like to share the experience on this topic. in the recent report by tongsong et al. (2), the maternal outcomes of normal mothers and those with hbh disease were not different. the common identified problems are fetal growth restriction, preterm birth and low birth weight (2).