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  1. Ballard Score - Perinatology.com

  2. Gestational Age - Pediatrics - Merck Manual Professional Edition

  3. Ballard Maturational Assessment - Wikipedia

  4. Gestational Assessment - Children's Hospital of Philadelphia

  5. Gestational Age Assessment - Stanford Medicine Children's Health

  6. Home page - Ballard Score

  7. Gestational Age Assessment - University of Rochester Medical Center

  8. Gestational Assessment - Ballard Score

  9. Gestational Age Assessment - Brigham and Women's Hospital