National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine pregnancy research support u.s. gov't female united states / epidemiology Infant infant mortality newborn P.H.S. pregnancy outcome risk factors outcome assessment health care / statistics & numerical data* c g prober pregnancy complications cost-benefit analysis morbidity probability herpes genitalis* / epidemiology infectious* / epidemiology a g randolph pmid:8510301 a e washington cesarean section* / adverse effects cesarean section* / economics cesarean section* / mortality cesarean section* / statistics & numerical data decision support techniques herpes genitalis* / prevention & control herpes genitalis* / transmission health care / economics