Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Regression of the plasma/blood Pb ratio on the number of miscarriages. Mexico City, Mexico, 1997–2004. Simple ordinary least squares regression model of the plasma/blood Pb ratio of lead as a function of the lifetime number of spontaneous abortions.
