• Agency for Healthcare Research and Quality (AHRQ)
• A Guide to Effective Care in Pregnancy and Childbirth
• Bandolier
• Cochrane Reviews
• Evidence-based Obstetrics & Gynecology
• Health Evidence Bulletins
• Medline Clinical Query Using Research Methodology Filters
• National Guideline Clearinghouse
• Netting the Evidence
• OBG Management: Examining the Evidence
• RCOG: National Evidence-Based Clinical Guidelines
• SaPeRiDoc
• TRIP Database

Statistics

• Electronic Textbook (Instruction)
  StatSoft
• GraphPad QuickCalcs (Calculators)
  
• Intuitive Biostatistics: Choosing a statistical test (Instruction)
  GraphPad
• Statistical Training on the Web (Links)
  BioSS
• Statistics at Square One (Instruction)
  British Medical Journal
• Statistics for Graduate Students (Links)
  
• VassarStats: Web Site for Statistical Computation (Calculators)
  Vassar College