GSTM1 and hemoglobinopathy: Blood count and dosage of hemoglobin (Hb) fractions (HbA2, Fetal Hb, Abnormal Hb) are among the specialist services provided by the Essential Levels of Care (LEA 2017) for the control of physiological pregnancy and are therefore free for all pregnant women and the partners of women who are heterozygous for hemoglobinopathies.