Donors are anonymous women who go through a rigorous selection process, which includes genetic, hormonal and psychological studies. Compatibility is sought with the mother in physical traits and genetic compatibility with the father to avoid the risk of recessive genetic diseases as much as possible.
All donors perform genetic studies for the detection of recessive mutations. Being a healthy carrier of a recessive mutation is completely normal and has no repercussions for the health of the person. The problem arises when the donor and the father of the future baby are carriers of the same mutation. In this situation, the newborn may be born with a disease that could have been avoided if the correct donor had been selected for that couple. This is what we call genetic matching and it is a highly recommended test when a couple undergoes an oocyte donation treatment.