Little loose with the facts here. 90% of clinic embryos are for future family planning. The 1st used are those most likely to produce a healthy baby. The remaining are less likely to achieve a pregnancy. 30-50% of all IVF created embryos will fail to grow within the first week. 35% don't survive the thawing process. The study mentioned stated that if all embryos available for research were used to create stem cells, only 275 would. This dilemma will become less necessary as IVF clinics move away from drug-induced mass harvesting - which is more dangerous and expensive for the women and produce lower quality outcomes (live births)