January – Birth Defects Month January – Birth Defects Month Congenital defects are the leading cause of infant mortality – The Pearl of the South Congenital defects are the leading cause of infant mortality on the Island – The Spokesman Congenital defects are the leading cause of infant mortality in the country - The new day Congenital defects: first cause of infant mortality on the Island – WAPA-TV Congenital defects in P.Rico are the leading cause of infant mortality – EFE Agency Congenital defects are abnormalities in the structure, functioning or metabolism (chemical processes) of the body present at birth. - TODAY