Safety of tetanus toxoid in pregnant women: a hospital-based case-control study of congenital anomalies.

Abstract

Reported are the results of the Latin American Collaborative Study of Congenital Malformations (ECLAMC), a hospital-based case-control study of 34,293 malformed and 34,477 matched nonmalformed newborn controls. No statistical differences were found between the malformed and control groups, exposed or not exposed to tetanus toxoid.