Huh.
So that's what they call 'em?
Huh.
So that's what they call 'em?
You want to know the truth?? When the wife's eggs are in the dish and the husband's sperm fertilizes them, not all of them do fertilize. Then, of the ones that do fertilize, not all of them continue to grow well and be ready to be implanted. And of those who do grow well and are ready to be implanted, not all of them grow 5 days, to the "blastocyst" stage. But those that do have the HIGHEST chance of being born.
That is why no reputable fertility doctor will implant more than two blasts into a woman. Because they tend to take! And these are the embryos Frist wants to use to cure diseases.