Gestational diabetes - which affects four in 100 pregnancies - was associated with a two-fold increase in the risk of autism, while bleeding in pregnancy was alleged to carry an 81% increased risk.
New drilling technologies have led in recent years to a modest increase in U.S. oil production, and over the past two decades, to a six-fold increase in U.S. conventional natural gas production.
Last week, the US department of agriculture released the most comprehensive analysis of data on GM crops in the US. As expected, these show a dramatic uptake among farmers - a six-fold increase to 50 million acres in just two years.