High rates of embryo wastage with use of assisted reproductive technology: a look at the trends between 1995 and 2001 in the United States

The vast majority of embryos produced in vitro and transferred fail to develop into an infant, supporting the concept that only a small fraction of embryos has the capacity to become a live birth. Clinicians should strive to reduce embryonic wastage without an adverse effect on delivery rates by perfecting methods of ovarian stimulation and embryo screening, and by transferring fewer embryos.