1. Genetic amniocentesis m twm pregnancies;Pijpers;Br J Obstet Gynaecol,1988
2. Neonatal complications;Plunkett;Obstet Gynecol,1973
3. Untoward neonatal effect of intraamniotic administration of methylene blue;Cowett;Obstet Gynecol,1976
4. Antiseptics and disinfectants;Harvey,1980
5. Inadvertent intrauterine injection of methylene blue in early pregnancy;Katz;N Engl J Med,1981