Frequency of maternal blood lead follow-up testing during pregnancy

Venous blood lead level (BLL; mcg/dL)	Perform follow-up test(s)
<5	None (no follow-up testing is indicated).
5 to 14	Within one month. Obtain a maternal BLL* or cord BLL at delivery.
15 to 24	Within one month and then every two to three months. Obtain a maternal BLL* or cord BLL at delivery. More frequent testing may be indicated based on risk factor history.
25 to 44	Within one to four weeks and then every month. Obtain a maternal BLL* or cord BLL at delivery.
≥45	Within 24 hours and then at frequent intervals depending on clinical interventions and trend in BLLs. Consultation with a clinician experienced in the management of pregnant women with BLLs in this range is strongly advised. Obtain a maternal BLL* or cord BLL at delivery.

BLL: blood lead level.
* If possible, obtain a maternal BLL prior to delivery since BLLs tend to rise over the course of pregnancy.

Reproduced from: Ettinger AS, Wengrovitz AG. Guidelines for the Identification and Management of Lead Exposure in Pregnant and Lactating Women. Centers for Disease Control and Prevention. November 2010.

Graphic 81402 Version 5.0

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Frequency of maternal blood lead follow-up testing during pregnancy