The aim of any infertility treatment should be a healthy, singleton baby born after an uncomplicated pregnancy. For many years fertility specialists have been focusing on achieving pregnancy as the main goal without realizing the consequences of multiple pregnancies on patients, obstetric care and society. The costs of a multiple pregnancy for the health service and community as well as the family will be 100-200 times greater than the costs of a singleton1. In in vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI) the number of transferred embryos can be controlled and therefore the chance of achieving a multiple pregnancy minimized. In many countries, only two embryos are replaced and the discussion of single-embryo transfer is ongoing.