张宏吉医师于2001-2007 纽约大学试管婴儿中心全职科学家，为纽约大学开发全美国第一例卵子冷冻。
•Grifo J, Labella P, Licciardi F, Chang HC, Liu H and Noyes N. (2006 ASRM) Clinical results of an oocyte cryopreservation program.
•Chang HC, Liu H, Zhang J, Grifo J, Krey LC. (2005 SRM) Vitrification of metaphase II oocytes impacts Oct-4 expression during subsequent preimplantation development. Oral presentation in Montreal, 61th Annual Meeting of the American Society for Reproductive Medicine.