Figure 5: Percentage of ongoing pregnancies per transfer after IVF in the time period from the initiation of the ART programme in 1994 to 2010. The dotted line represents the average percentage of ongoing pregnancies in all Belgian ART centres. (1) Indicates the start of systematic investigation and treatment of all male partners of infertile couples before IVF. (2) Indicates the start of the complementary treatment with NFS of the male and the female partner before IVF.