Abstract:
There are many methods for treating infertility patients, of which IVF plays an important role in the field of assisted reproduction and development and has increasingly widespreaded in the world. However, the success rate in assisted reproduction has only reached 30-40%. Currently, most are choosing embryos based on morphological criteria of the embryo. However, the morphological assessment does
not fully reflect the true quality of the embryos if only based on morphological parameters, so the results of in vitro fertilization treatment is still limited. To improve the quality of the treatment and refinement of some genetic diseases, Preimplantation Genetic Diagnosis (PGD) is one of the critical, urgent and practical requirements. On that basis, the authors have conducted a project “Study on embryo morphological changes after embryo biopsy for genetic diagnosis prior to embryo transfer” to evaluate embryo morphological changes and assess some factors affecting the ability of embryo survival and creating blastocyst after biopsy. Subjects and Methods: 102 surplus embryos have been biopsied on day 3. The quality is evaluated based on the author Andres Salumets (2001) [1] on three main criteria: number of blastomeres in an embryo, uniform between embryos, and percentage rate between cytoplasm fragments and the embryo volume. The results have shown that: after 24 hours of biopsy, survival rate of embryos and further development of the 3 groups is 93 embryos in total 102 embryos, reaching 91.17%; and after 48 hours, blastocyst formation is 83, reaching 81.37%. The number of embryos that survive and continue their development (AA and AB) accounts for 65.68% (67 embryos). Cytoplasm fragment ratio, ZP thickness, embryo diameter among the groups have not changed significantly. In conclusion, laser biopsy does not alter embryo morphology, viability and blastocyst forming. The higher maternal age, duration of infertility, FSH concentration, the less survival rate of embryos and blastocyst forming. IVF or ICSI does not affect the survival rate of embryos, further development of blastocyst after embryo biopsy.
Keywords:
embryo morphology, infertility patients, laser biopsy, Preimplantation Genetic Diagnosis.