After a 3 day embryo transfer

Days Past
Transfer (DPT)  Embryo Development

 One The embryo continues to grow and develop, turning from a 6-8 cell embryo into a morula

 Two The cells of the morula continue to divide, developing into a blastocyst

 Three The blastocyst begins to hatch out of its shell

 Four The blastocyst continues to hatch out of its shell and begins to attach itself to the uterus

 Five The blastocyst attaches deeper into the uterine lining, beginning implantation

 Six Implantation continues

 Seven implantation is complete, cells that will eventually become the placenta and fetus have begun to develop

 Eight Human chorionic gonadotropin (hCG) starts to enter the blood stream

 Nine Fetal development continues and hCG continues to be secreted

 Ten Fetal development continues and hCG continues to be secreted 

 Eleven Levels of hCG are now high enough to detect a pregnancy