«What we want this technology to achieve is confidence to switch to single
embryo transfers instead of the practice of transferring multiple embryos without [an accompanying] reduction in pregnancy rate,» study co-authors Gayle Jones and David Cram, senior research scientists in immunology and stem cells at Monash University in Australia, wrote in an e-mail.
Also critical: blastocyst
transfer [allowing
embryos to develop robustness in a lab for five days
instead of the usual three before
transfer back into the uterus].