egg donation

A. If the ovum is of gentile origin, according to most poskim the child born has to go through a conversion (Giur) procedure.
B. A comparative review (in Hebrew) on the issue of anonymity

C. More about ovum donation in Israel can be accessed here.

D. For more information please see:
1 My article "In-Vitro Fertilization, Embryo Transfer, and Embryo Freezing", Jewish Medical Ethics Vol II, pp. 162 – 171, with special attention to pages 169 – 171, and the references there.
2 A. Steinberg M.D., Encyclopedia of Jewish Medical Ethics, pub. Feldheim Publishers (Jerusalem – New York, 2003) Vol. II, value "IVF", pp. 571 – 586.

with special attention to pages 577 – 580.
3 Abraham S. Abraham, M.D., FRCP, Nishmat Avraham Pub: Artscroll Mesorah Publications' Volume III, Even Ha'Ezer & Choshen Mishpat, pp. 16 – 17.