Published online by Cambridge University Press: 31 July 2008
An analysis of the use-effectiveness of fertility awareness methods of family planning among clients in a San Diego, California, clinic reveals a 12-month failure rate (life-table method) of 13·2 failures per 100 women. This is comparable to results from previous studies of the use of fertility awareness methods (as defined by the sympto-thermal method) in developed nations. Also consistent with previous studies is the finding that fertility awareness method users tend to be young and well-educated. Motivational factors are identified as being most closely associated with successful use of this method of family planning.