Women should meet the daily recommended allowance of both folic acid and vitamin B12 when trying to conceive, and during the first trimester of pregnancy, a new study suggests. The Department of Health currently advises women thinking of starting a

six weeks after birth. They believe that a combination of certain genetic factors and a deficiency of the acid can lead to depression after childbirth.Dr Shapiro, of the University of Montreal, said there might be a connection between the fatty acid