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Small puma populations have been isolated by the freeway, and their offspring were showing signs of birth defects.

A surge of infections from a tropical virus is raising alarm among public health officials because it appears to be causing birth defects similar to those associated with Zika virus.

The mixture contained dioxin, a deadly substance that not only causes a range of cancers and other illnesses, but is also linked to birth defects for babies exposed in utero.

During the legal battle, Lewis's parents fought to prove a link between industrial pollution and birth defects.

A 1999 Northamptonshire Health Authority study found no unusual cluster of birth defects.