books.google.com.au - A collection of letters by the author to her unborn child with an abnormality known as "posterior urethral valve", a defect in which a valve in the urinary system does not open. As a result, the baby is unable to empty fluid from the bladder to the amniotic sac....http://books.google.com.au/books/about/Letters_to_Gabriel.html?id=aw8FAQAAIAAJ&utm_source=gb-gplus-shareLetters to Gabriel
