date:Jun 13, 2012
at the current prevalence of neural tube defects (NTDs) in New Zealand is not precisely known and so there is no baseline from which estimates of the effects of folic acid fortification can be made.
All that can be said is that the prevalence had been falling for several years until 2003 and, if this decline has continued, the prevalence may by now have reached about 7 per 10,000 births per year. This is likely to be a floor level, where folic acid may have no further effect,the said.
Accordin