A donor egg is an egg (oocyte) that is provided by a woman (the donor) and used by another person (the recipient) to achieve pregnancy, typically through in vitro fertilization (IVF).
Egg donation is a process in which a fertile woman donates her eggs to help:
Another woman conceive (commonly due to infertility or medical conditions).
Sometimes for research or fertility preservation.
Donor eggs are used when a woman:
Has poor egg quality or low ovarian reserve
Has premature ovarian failure
Is of advanced maternal age
Has a genetic disorder she doesn't want to pass on
Has had multiple failed IVF cycles
Is a same-sex male couple or single male using a surrogate