Analysis of information sources in references of the Wikipedia article "Teratology" in English language version.
Although no adverse effects of IPV have been documented among pregnant women or their fetuses, vaccination of pregnant women should be avoided on theoretical grounds. However, if a pregnant woman is at increased risk for infection and requires immediate protection against polio, IPV can be administered in accordance with the recommended schedules for adults.
Until 1940, it was assumed that congenital defects were caused primarily by hereditary factors. In 1941, the first well-documented cases were reported that an environmental agent (rubella virus) could produce severe anatomic anomalies.
