GSTM1 and Iron deficiency anemia: Hence, the above proportion of women without Hb measurements indicates that despite state-supported ANC and free access to medication for the treatment of iron deficiency anemia during pregnancy (if detected before GA week 13), almost one-fifth of all pregnant women may not receive the care they require or if they do, it may not be registered in the GBR, although this registration is mandatory for ANC providers.