Social factors that can categorize a pregnancy as high risk include an occupation involving handling of toxic substances, refusal of or neglected prenatal care, exposure to environmental teratogens, lack of support person, inadequate home for infant care, environmental contaminants at home, disruptive family incident, unplanned cesarian birth, lack of access to continued health care, isolated, lower economic level, poor access to transportation for care, decrease economic support, lack of access to emergency personnel or equipment, high altitude, highly mobile lifestyle, poor housing, history