Which are the criteria of good embryos for transfer on 3day in IVF ET program Won HJ, Park EA, Lee DR, Lee WS, Lee SH, Kwak IP, Kim SH, Yoon TK, and Cha KY. 2005 AOCOG

Comparison of Basic Medium for the In Vitro Maturation for Human Immature Oocytes H.j. Won, E.A. Park, D.R. Lee, J.H. Cho, T.K. Yoon, K.Y. Cha 2005 American Society for Reproductive Medicine

Increased pregnancy rates closely related to the transfer of early cleaved embryos H. Kim, D. Lee, E. Park, S. Han, H. Won, T. Yoon 2006 American Society for Reproductive Medicine

Super-rapid cooling using slush nitrogen (SN2) may improve the efficacy of human oocytes after vitrifying/warming S.K. Cha, J.H. Eum, D.R. Lee, W.S. Lee, H.J. Won, T.K. Yoon, K.R. Cha. 2007 European Society of Human Reproduction & Embryology

Effect of supplemented folic acid in the maturation medium on the maturation of porcine immature oocytes and subsequent embryonic development D.R. Lee, E.S. Kim, J.E. Lim, J.S. Seo, A.R. Kim, H.J. Won 2008 American Society for Reproductive Medicine

Clinical efficacy of Intracytoplasmic morphologically selected sperm injection(IMSI) in infertile patients with severe male factor or poor prognosis Choi YJ, Kim YH, Lee DR, Seok HH, Lee WS, Won HJ, Yoon TK 2010 20th International Federation of Fertility Societies

An improved efficacy on vitrification of blastocyst undergone laser assisted hatching (LAH) following artificial shrinkage (AS) using micro-needle Kim TH, Han JE, Kim YS, Won HJ, Cho JH, Choi WY, Lee JH, Yang YH, Lee DR, Lee WS 2009 Conference of the Pacific Rim Society for Fertility and Sterility

Elevating Cooling Rate by Slush Nitrogen Could Reduce The High Concentration of Cryoprotectants for Blastocyst Vitrification H.J. Won, J.K. Park, J.H. Eum, D.R. Lee, Y.S. Kim, T.K. Yoon. 2009 American Society for Reproductive Medicine.

Clinical outcome of using hyaluronan-bound sperm in human ICSI program Lee JH, Yang YH, Choi KH, Cha SK, Park JK, Choi MA, Lee DR, Kim YS, Won HJ, Song SH, Kwak IP, Yoon TK 2009 Conference of the Pacific Rim Society for Fertility and Sterility

Effects of using Slush Nitrogen and various cryoprotectants composition/concentrations on vitrification of mouse GV and MII oocytes Cha SK, Kim BY, Lee YY, Kim TH, Lee DR, Kim MK, Won HJ, Han JE, Lee WS, Yoon TK 2009 Annual Meeting of the Society for Cryobiology

Association between sex steroid, ovarian reserve and vitamin D levels in healthy fertile women E. Chang, Y. S. Kim, H. J. Won, M. J. Kim, W. S. Lee, T. K. Yoon. Fertility and Sterility Volume 100, Issue 3, Supplement, Page S326, September 2013

Vitirification versus slow-controlled method in frozen embryo transfer cycle : a comparative study in number of cryopreserved human blastocyst Kim TH, Cha SK, Choi KH, Eum JH, Lee DR, Kim YS, Kim JH, Kim MK, Chang EM, Cho JH, Cha KY, Yoon TK 2007 Conference of the Pacific Rim Society for Fertility and Sterility