Vast improvements have been made in the effort to reduce multiple birth rates in ART. In the USA, higher live birth rates and higher implantation rates per transferred embryo combined with professional self regulation of the number of embryos transferred have contributed to this effort. These trends have taken us in the right direction but more work remains to be done to bring high order multiple birth rates and twin rates to zero and encourage SET.
Expert Rev of Obstet Gynecol. 2013;8(4):357-368. © 2013 Expert Reviews Ltd.