IVF with donor eggs involves many of the same procedures as IVF with a female partner’s own eggs. The egg donor’s ovaries are stimulated with fertility drugs to produce a number of mature eggs which are retrieved. The eggs are then fertilized in the laboratory with the male partner’s sperm. At the same time, the woman who will carry the baby is treated with estrogen and progesterone to get her cycle in line with the donors. When the embryos are ready, one or two or whatever number has been agreed on with the fertility doctor is transferred to the carrier or birth mother. If all goes well the embryo implants in her uterus and grows over time into a baby.