What type of birth control is the donor allowed to use before and during the cycle?
Essentially any method of birth control is ok to use prior to the stimulation cycle. Hormone secreting IUDs, such as the Mirena must be removed prior to beginning stimulation. During the stimulation cycle, the donor agrees to abstain from intercourse. This abstinence must continue until the menstrual period following stimulation as, on occasion, one or more eggs may not be removed at the time of retrieval. Unprotected intercourse could result in fertilization of that egg(s), resulting in a pregnancy in the donor.
