HS Yoon, HJ Kim, JH Lee, DR Lee, JH Cho, SI Roh. Preimplantation genetic diagnosis of single blastomere by FISH and PCR in human embryos. Korean Association of Obstetricians and Gynecologists 1995.

SH Lee, DR Lee, HS Yoon, HR Paik, HJ Lee, HN Shim, JH Cho, SI Roh. The effects of biochemical zona thinning by pronase E on hatching rate and pregnancy rate in mouse and human embryos. Korean Society of Fertility and Sterility 1994.

HE Ryu, EJ Oh, HR Paik, IK Jeon, KR Kim, JH Cho, SI Roh, HS Yoon. Combined score system of PN morphology, early cleavage, and embryo development is highly predictable of pregnancy outcome in human ART programs. ESHRE p430, 2003.

EJ Oh, HR Paik, BR Do, JH Cho, SI Roh, HS Yoon. Relationships between embryo development and PN morphology according to the quality of retrieved oocytes in human IVF-ET program. European Society of Human Reproduction and Embryology 2002.

BR Do, SJ Yoon, JH Cho, YJ Lim, SI Roh, and HS Yoon. Relationship between cytoplasm size and its meiotic potency in human in immature oocyte from unstimulated cycles in IVM-IVF-ET Program. 56h Annual Meetings American Society for Reproductive Medicine 2000.

YJ Lim, IK Jeon, SJ Yoon, BR Do, JH Cho, SI Roh, and HS Yoon. Fertilization and embryonic development according to the maturation timing of oocytes in unstimulated IVM-IVF-ET program. 56h Annual Meetings American Society for Reproductive Medicine 2000.

BR Do, HR Paik, DR Lee, SJ Yoon, JS Jeon, JH Cho, SI Roh, HS Yoon. Clincial use of immature oocyte from normal and PCO women in non-stimulated IVF-ET program. 55h Annual Meetings American Society for Reproductive Medicine 1999.

JE Lee, DR Lee, HR Paik, HN Shim, JH Cho, SI Roh, HS Yoon. Biochemical assisted hatching(BAH) increased the implantation and pregnancy rate in human cryopreserved embryo transfer. 55h Annual Meetings American Society for Reproductive Medicine 1999.

JE Lee, DR Lee, BR Do, HR Paik, SJ Yoon, JS Jeon, SH Lee, JH Cho, SI Roh, HS Yoon. Outcom of biochemical assisted hatching in 1068 IVF-ET cycles using pronase in human assisted reproductive technololgy. 11th World Congress on In Vitro Fertilization and Human Reproductive Genetics 1999.

JE Lee, DR Lee, BR Do, HR Paik, JH Cho, SI Roh, HS Yoon. Improvement of pregnancy and implantation rate by biochemical assisted hatching in human IVF-ET. 11th World Congress on In Vitro Fertilization and Human Reproductive Genetics 1999.

SI Roh, DR Lee, HR Paik, JH Cho, HS Yoon. Prevention of recurrent abortion and delivery of normal baby from chromosome translocation carrier patient by preimplantation genetic diagnosis using fluorescence in-situ hybridiazation. International Session of the 51st JSOG Meeting 1999.

BR Do, SJ Yoon, HR Paik, JH Cho, SI Cho, HS Yoon. Successful pregnancy in IVF-ET program by immature oocyte retrival without ovarian stimulation. International Session of the 51st JSOG Meeting 1999.