-1dpt ..embryo is growing and developing
0dpt… Embryo is now a blastocyst
1dpt….Blastocyst hatches out of shell on this day
2dpt.. Blastocyst attaches to a site on the uterine lining
3dpt.. Implantation begins,as the blastocyst begins to bury in the lining
4dpt.. Implantation process continues and morula buries deeper in the lining
5dpt.. Morula is completely inmplanted in the lining and has placenta cells & fetal cells
6dpt…Placenta cells begin to secret HCG in the blood
7dpt…More HCG is produced as fetus develops
8dpt…More HCG is produced as fetus develops
9dpt…HCG levels are now high enough to be immediately detected on HPT

* This excerpt from an unknown source was confirmed to be reasonably correct by Dr.V

- Week 17 answers kindly provided by Dr. Stephan Volschenk -

Whether to grow to day 3 or 5 should be individualised according to the specific circumstances of each case. However, recent literature supports the fact that a day 5 growth has a better outcome if compared directly with day 3 transfers from a pregnancy rate point of view. However, each case should be individualised and judged according to the circumstances surrounding each case.