Seventy-two pregnant patients diagnosed of minor or intermediate beta thalassemia with mild
anemia were randomly assigned to treatment group and control group. Patients in the treatment
group were given 15 g of Colla corii asini in powder form daily for 4 weeks while the control
group were observed and followed up in the same period without any treatments. Levels of
hemoglobin(Hb), serum iron (SI), serum ferritin (SF) and three types of hemoglobin components
[adult hemoglobin (HbA), fetal hemoglobin (HbF), minor adult hemoglobin (HbA2)] were measured
before and after treatments.