The relative contribution of assisted reproductive technologies and ovulation induction to multiple births in the United States 5 years after the Society for Assisted Reproductive Technology/American Society for Reproductive Medicine recommendation to limit the number of embryos transferred Richard P. Dickey, M.D., Ph.D. Fertility and Sterility Volume 88, Issue 6, Pages 1554-1561 (December 2007) DOI: 10.1016/j.fertnstert.2007.01.112 Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions
Figure 1 United States total of twin, triplet, or higher order births: 1971–2003, Adapted from Dickey and Sartor (25). Fertility and Sterility 2007 88, 1554-1561DOI: (10.1016/j.fertnstert.2007.01.112) Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions
Figure 2 Percentage of in vitro fertilization pregnancies that are triplet or higher order: 1997–2003. Fertility and Sterility 2007 88, 1554-1561DOI: (10.1016/j.fertnstert.2007.01.112) Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions