張宏吉醫師於2001-2007 紐約大學試管嬰兒中心全職科學家,為紐約大學開發全美國第一例卵子冷凍。
•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.