Statistics are, of course, only numbers; in analogy to the proverb, never believe statistics you have produced yourself. The German IVF Register (DIR) was founded to prevent this and create a basis where genuine comparison is possible. Statistics from the DIR are based on data reported to the DIR from all Germany's IVF centres; they comply with stringent quality standards and are thus considered to be extremely valuable. This quality status is mainly due to the fact that treatment cycles must be reported in advance, i.e. before it is clear how treatment will progress and whether a treatment will result in an embryo transfer or even pregnancy. We call this procedure prospective data logging. To be meaningful, comparisons of statistics must be based on the same conditions. This is not always the case with statistics that have been "tweaked" for advertising purposes, particularly those boasted by many international centres. In addition, statistics should carry information on the average number of embryos transferred, age-dependency and the period of time to which the figures apply.
Of course the probability of pregnancy increases with the number of treatment cycles undergone by the patient - particularly if additional pronuclear egg cells could be frozen in one or other of the puncture cycles. And here we come to the second piece of information of importance for you: the "cumulative pregnancy rate". Calculating this figure is far more difficult. However, you can assume that after three to four therapy cycles an average of 60%-80% of women treated became pregnant.
Please, click on this graphic below then you are able to click by all statistics with that