Levitas E., Lunenfeld E., Har-Vardi I., Albotiano S., Sonin Y., Hackmon-Ram R., Potashnik G. Blastocyst-stage embryo transfer in patients who failed to conceive in three or more day 2-3 embryo transfer cycles: a prospective randomized study. Fertil Steril;81(3): 567 – 71, 2004.
Levitas E., Parmet A., Lunenfeld E., Bentov Y.,Burstein E.,Friger M.,Har-Vardi I..Albotiano S.,Sonin Y.,Potashnik G. The impact of hypnosis during embryo transfer on IVF/ET outcome: a case control study. Fertil Steril; 85(5): 1404- 1408, 2006.
Levitas E, Lunenfeld E, Weisz N, Friger M, Potashnik G. The relationship between age and semen parameters in normozoospermic men: analysis of 6022 semen samples. Andrologia, 39: 45-50, 2007.