 A mathematical model i.e. a fractional factorial design, which is both orthogonal and balanced, created according to published principles; Street and Burgess, 2007 will define how many of all combinations of attributes and levels will be questioned. To realize choice sets i.e. define to which hypothetical fertility treatment to compare each selected combination with maximum differentiation between the compared hypothetical fertility treatments, a fold-over technique will be applied to result in mirror scenarios. We will make sure that the efficiency of the final design, calculated according to Street and Burgess 2010b, will ensure 100 informative value. 