During a 9-year period, 2002-2010, the birth rate decreased steadily from 2002 to 2006, but increased suddenly from
2007 to 2010. The rate of preterm birth was increased steadily from 2004 to 2010 (9.44%-13.70%). The rate of threatened
preterm labor was constantly between 6.0 and 8.9%. Among preterm births, low birth weight infants were mostly found except
in the year 2003. Early neonatal death was mostly caused from fetal abnormality. The trend of neonatal death from prematurity
had continuously declined and there was no early neonatal death from 2008 to 2010