Despite the entrenched acceptance of normal science in health care, it appears that authoritative, positivist, linear, risk averse, certainty-based thinking can only get us so far along the route of optimum health. This paper examines labor and childbirth as a paradigm case of a complex adaptive system (CAS) and offers the example of techniques used in a master-level course on normal childbirth to illustrate how maternity care clinicians can be introduced to complexity-based thinking through reflexive analysis of real life clinical (...) narratives. It suggests that these techniques might be used as a basis for answering the question, what is likely to work for this person, in this situation, given the range of evidence, and given their values and beliefs, my values and beliefs, and my clinical skills and knowledge? Topics discussed in this paper include complexity, pregnancy, and childbirth; mainstreaming complexity-focused decision making in maternity care; and using story in practice. In conclusion, complexity theory appears to offer a good explanatory model for pregnancy and childbirth, both in general, and for specific individuals. Future work in this area should examine the efficacy and limits to formal story telling in maternity care, with the aim of increasing optimal maternity care for mothers and babies, and for the staff and organizations that deliver the care. (PsycINFO Database Record (c) 2010 APA, all rights reserved). (shrink)