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Air Quality Criteria for Lead Volume II of II - (NEPIS)(EPA) - US ...

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AX6-170<br />

Table AX6-6.1 (cont’d). Placental Transfer <strong>of</strong> <strong>Lead</strong> from Mother to Fetus<br />

Reference and<br />

Study Location Study Description Pb Measurement Findings, Interpretation<br />

United States (cont’d)<br />

Fahim et al. (1976)<br />

Missouri<br />

249 mother-infant pairs from Columbia.<br />

Samples also collected from 253 mothers<br />

from Rolla who delivered near Pb mining<br />

areas.<br />

Term pregnancies:<br />

Columbia (n = 240):<br />

Maternal blood Pb:<br />

Mean 13.1 µg/100 g (SE 0.31)<br />

Fetal blood Pb:<br />

Mean 4.3 µg/100 g (SE 0.10)<br />

Placenta blood Pb:<br />

Mean 7.0 µg/100 g (SE 0.01)<br />

Cord blood Pb:<br />

Mean 11.0 µg/100 g (SE 0.31)<br />

Rolla (n = 177):<br />

Maternal blood Pb:<br />

Mean 14.3 µg/100 g (SE 0.16)<br />

Fetal blood Pb:<br />

Mean 4.6 µg/100 g (SE 0.08)<br />

Placenta blood Pb:<br />

Mean 8.0 µg/100 g (SE 0.06)<br />

Cord blood Pb:<br />

Mean 11.0 µg/100 g (SE 0.14)<br />

Maternal-fetal blood Pb:<br />

Correlation coefficient = 0.29

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