Over the last 30 years, Anti-D, or Rhogam as it is known in the USA, has become accepted as being routinely advisable for rhesus negative women. Yet the question remains that - if women's bodies are designed to give birth without intervention for the majority of the time - why is this necessary? This book explores the paradox between physiological birth and the routine 'need' for anti-D and highlights some interesting evidence which may throw light on this paradox. Are women's bodies really fallible, or could some women's need for anti-D be caused by medical intervention in childbirth? Do women being offered anti-D know that this is a blood product which may carry attendent risks? What information do women need in order to decide whether or not they will have anti-D?