Avoiding multiple pregnancies: sailing uncharted seas.

Single embryo transfer is being proposed as the solution to avoid multiple pregnancies in IVF. Nevertheless, in my opinion, although this is the right solution, it is still not the correct one at the present time. Mainly, it is unfair to the majority of infertile couples and it will also severely limit the physician's capacity to resolve unfavourable IVF cases. Furthermore, current IVF technology is far from perfect and the impact of single embryo transfer needs to be evaluated in patients over 38 years of age, poor responders, and also in regard to blastocyst transfer and the development of pre-implantation genetic diagnosis.