Ladies, in case you are interested to know What Happens After an Embryo Transfer:
http://www.nyufertilitycenter.org/ivf/embryo_transfer
Once you complete your embryo transfer, you will have approximately 1½ weeks to wait before a pregnancy can be detected. The following tables outline an approximate timeline for what happens during a successful pregnancy after a 3-day transfer (3dt).
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3-Day Transfer (typically sg ivf uses 3-day transfer, if im not wrong)
DPT One - The embryo continues to grow and develop, turning from a 6-8 cell embryo into a morula
DPT Two - The cells of the morula continue to divide, developing into a blastocyst
DPT Three - The blastocyst begins to hatch out of its shell
DPT Four - The blastocyst continues to hatch out of its shell and begins to attach itself to the uterus
DPT Five - The blastocyst attaches deeper into the uterine lining, beginning implantation
DPT Six - Implantation continues
DPT Seven - Implantation is complete, cells that will eventually become the placenta and fetus have begun to develop
DPT Eight - Human chorionic gonadotropin (hCG) starts to enter the blood stream
DPT Nine - Fetal development continues and hCG continues to be secreted
DPT Ten - Fetal development continues and hCG continues to be secreted
DPT Eleven - Levels of hCG are now high enough to detect a pregnancy
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just to share, for NUH, BT is on PET D13. For some successful ones, preg test on D9 could show +ve already.