| The trophoblast eventually forms the placenta, through which the embryo proper receives dissolved nutrients and is cleansed of waste. |
| The embryo has actually implanted before the woman misses her first period. |
| I misread the piece to mean that both liberals and conservatives favored embryo research. |
| It's about an embryo mix-up in an IVF clinic resulting in a black couple and a white couple giving birth to each other's babies. |
| No one has yet converted a single blastomere from an eight-cell embryo into a stem cell line. |
| A single blastomere is removed from each 8-cell human embryo for the purposes of preimplantation genetic diagnosis. |
