5406 Phyllida Brown: Balancing the risks of breast and bottle. New Scientist 19 June 1993, 10. For women infected by HIV, deciding whether to breast-feed or bottle-feed is complicated by the risk that the baby might become infected through breast milk. Babies can be infected with HIV by their mothers while in the womb, during birth and through breast milk. Birth itself may be the most dangerous time, but scientists still do not know the contribution each route makes to the number of infections. D. James/P. Steer/C. Weiner/B. Gonik: High risk pregnancy. Saunders 1993, 990p. 0-7020-1575-x. £ 65. Ignaz Semmelweis: Die Ätiologie der Begriff und die Prophylaxis des Kindbettfiebers. 1861, 540p. 5390 William Vega/Bohdan Kolody/Jimmy Hwang/Amanda Noble: Prevalence and magnitude of perinatal substance exposures in California. New England J. Med. 329 (1993), 850-854. The obstetrical and neonatal complications associated with substance use by pregnant women include low birth weight, prematurity, abruptio placentae, fetal distress, stillbirth, cerebral infarctions, congenital malformations, and neurobehavioural dysfunction. There have been few population-based epidemiologic studies to identify the prevalence and demographic profiles associated with drugs, alcohol, and smoking during pregnancy.