1. Synchronization between endometrial and embryonic age is not absolutely crucial for implantation 
Tal Imbar, M.D., Arye Hurwitz, M.D. 
Fertility and Sterility 
Volume 82, Issue 2, Pages (August 2004)
DOI: /j.fertnstert

2. FIGURE 1
Schematic representation of the endometrial preparation of our case in relation to the planned frozen-thawed protocol and the original IVF cycle. OPU = ovum pickup; ET = embryo transfer.
Imbar. Progesterone priming of endometrial implantation. Fertil Steril 2004.
Fertility and Sterility  , DOI: ( /j.fertnstert )