Lead interferes with the proper functioning of enzymes which are necessary for the biochemical reactions inside body cells. This results in anaemia (shortage of blood haemoglobin), abnormal brain development in children, aggressive or antisocial behaviour, headache, irritability, sleep disorders, abdominal cramps, low sperm count in males and miscarriages and smaller babies in females. Lead toxicity has no link with uterine cancer. The finding in the case described is probably coincidental.