1. Andrews EB: Use of observational methods to monitor the safety of marketed medications for risks of birth defects. In Proceedings of the Food and Drug Administration Conference on Regulated Products and Pregnant Women. Virginia, 1994
2. Physicians' Desk Reference;Barnhart,1991
3. Introduction to the pharmacology of ergot alkaloids and related compounds as a basis of their therapeutic application;Berde,1978
4. Effects of exposure to benzodiazepine during fetal life;Bergman;Lancet,1992
5. Requirements and limitations in reproductive and teratogenic risk assessment;Blake,1988