1, But it is also clear that the blastomeres in a two-cell or a four-cell embryo are not differentiated.

2, Each of the two blastomeres developed into a whole embryo.

3, CONCLUSION:Blastomere survival status is a most important factor influencing the implantation rate of frozen-thawed embryo transfer.

4, Objective:To evaluate the influence of the blastomere survival and resumption of mitosis on the clinical outcome in frozen-thawed embryo transfer(FET)cycles.

5, The blastomere size and the cleavage speed became different distinctly at the late cleavage.

6, Conclusions: The damage rate of blastomere cells is better for the evaluation of the extent of embryo damage than embryo survival rate.

7, Conclusion:Single blastomere PCR is stable and reliable, and it can be used for preimplantation genetic diagnosis.

8, AIM: To study the impact of blastomere survival on the implantation rate of frozen-thawed embryo transfer FET.

9, Most of current investigations on its origin were focused on the peculiarities of 4N blastomere such as doubled ploidy and the comparatively enlarged cell size.

10, Results : 1. MN - PCR detecting HLA - A, B,[http:///blastomere.html] DR typing in single - lymphocyte and single - blastomere was successfully established.

11, Objectives:This study is to set up a technique of single blastomere PCR, and to provide a basis for preimplantation genetic diagnosis.

12, During early cleavage, ? ? - tubulin distributes around the blastomere nuclei.

13, Hence, potentially viable embryos will be discarded upon screening a single blastomere.