After a day or so, these nascent embryos are carefully examined in an effort to distinguish between any that are defective and those that seem to be healthy and most likely to implant and develop.
سپس هر کدام که ظاهری سالم دارد و به احتمال زیاد قابل کشت و رشد است ،‏ برای این کار انتخاب می‌شود .‏