reading on embie growth

Some light reading...haha

Not a documented source, but women tend to know these types of things once they have been through IVF before:
The first day the one cell should become two.
The second day the cells should split and become 4 cells
The 3rd day the four should split and be at least 8. Less than 8 means a slow grower where  8-10 is ideal, and more than 10 is a quick grower (not really ideally a good thing either). There have been women getting pregnant from 4, 5, 6, 7 cells. It doesn't effect the development of the child it just means whether or not it has a good chance of implanting and continuing growth.  Mostly all embryos have some degree of fragmentation, I think 10% is ok and the higher the percent the lower the chance of implantation. 

http://www.advancedfertility.com/eggspregnancyrates.htm

3dt: 3 day transfer


HPT1dpt ..embryo is growing and developing
2dpt... Embryo is now a blastocyst
3dpt....Blastocyst hatches out of shell on this day
4dpt.. Blastocyst attaches to a site on the uterine lining
5dpt.. Implantation begins,as the blastocyst begins to bury in the lining
6dpt.. Implantation process continues and morula buries deeper in the lining
7dpt.. Morula is completely inmplanted in the lining and has placenta cells & 
fetal cells
8dpt...Placenta cells begin to secret HCG in the blood
9dpt...More HCG is produced as fetus develops 
10dpt...More HCG is produced as fetus develops 
11dpt...HCG levels are now high enough to be immediately detected on 
HPT

5dt: 5 day transfer

-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 implanted 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