The University of Louisville’s Birth Defects Center has received a renewal of funding from the National Institutes of Health. The center was awarded just under $9-million five years ago for research. Today the center announced that amount has been renewed by NIH for another five years.Director Dr. Robert Greene says although researchers have made some breakthroughs, there is still much work to be done."Despite ongoing research, 70-percent of the causes of birth defects are entirely unknown.," says Greene. "Moreover, birth defects are the single leading cause of infant mortality."The center also received an additional grant of $1.5-million. That money will be used for a specific research project on gene mutations in babies.