IVF treatment – Data Analysis The table below displays the success rate of invitro fertilisation over a six-year period, shown as the percentage of treatment cycles, which resulted in the birth of a baby. Use the data to draw a graph, then answer the questions that follow. Year 1992 1993 1994 1995 1996 1997 Questions 1. What trend does the graph show? (Remember to quote figures!) 2. Can you explain these results? What factors might affect the success rate? 3. What would you expect the success rate to be for 2002? Explain your prediction. 4. Suggest why it is unlikely that the success rate will ever exceed 50%. % of successful IVF cycles 12.7 13.0 14.2 14.4 15.2 16.7