To assess the effects of a lactoferrin supplemented formula on fetal development , iron metabolism and immunity in healthy pregnant women. One hundred and twenty healthy pregnant women (24\

Inclusion Criteria:

• healthy pregnant women with gestational weeks between 24 and 26;
• with hemoglobin concentration > 110g / L;
• without indication of abortion;
• without infectious disease or hereditary disease;
• without iron supplementation before enrollment.

Exclusion Criteria:

• with red blood count <3.5*10^12/L，hemoglobin concentration<110g/L or serum ferritin <20 μg/L；
• diagnosed with gestational diabetes mellitus;
• enrolled in other intervention study within past 1 month.

Available when oversight authorities require.