Assisted reproductive treatments are never 100% successful.
As far as percentages is concerned, whereas in artificial insemination they are around 14-21% of pregnancy, in the case of In Vitro Fertilization they are around 40%.
It is to be noted that these percentages depend greatly on the age of patients, the factor infertility, the lifestyle …
Nowadays, the research centres are working to improve these techniques and the obtained results.