Donor eggs

How many eggs will I receive?

You will receive 6-7 mature eggs. Our research has shown that 6-7 mature oocytes are necessary to produce sufficient embryos to transfer with good success rates. In addition to this number of mature oocytes * there is a possibility that between 1 and 3 embryos may be vitrified, per batch, on day +5. * We must emphasize that we cannot assure that in a batch there will be embryos to freeze.

Are eggs fresh or frozen?

Eggs are imported to us and are frozen.

How do I know I am receiving good eggs?

The eggs are not graded, rather they are considered mature or immature. You will receive mature eggs to make embryos. These eggs are from healthy donors under 34 years of age so the quality is maximized. Subsequently embryo quality can be classified by your embryologist.

Will the Vitrified oocytes survive?

The survival rate of vitrified / thawed oocytes is close to 100%, so you will have at least one viable embryo available for transfer on day 5, unless the reason there are no embryos available is due to a male factor and beyond our control.

Can we know or see pictures of the donor?

No, the law establishes the anonymity of gamete donation. Identifying information can be obtained by donor conceived children at age 18.

How important is the blood type?

Medically, the donor’s blood type does not affect your chances of pregnancy. Patients who choose not to reveal the genetic origin of their children may want to choose a blood type that complements with either the male or female partner.

How are donors screened?

The donors are women between 18 and 33 years old, who are in good health both physically and psychologically and they undergo exhaustive gynaecological, serologic and genetic exams. Only 34% of the donor candidates end up being declared eligible after these tests. 73% of the candidates are discarded for medical reasons (such as family history of diseases such as epilepsy or thalassemia, etc.).

Genetic testing excludes candidates with autosomal recessive mutations, including cystic fibrosis, hemoglobinopathy, spinal muscular atrophy, alpha and beta thalassemia, as well as more than 30 X-linked diseases, such as Haemophilia, X-fragile, Alport syndrome, some dystrophies, etc. This means that the candidates carrying mutations related to any of these diseases will not be part of our oocyte donation program.

How can I reserve a batch of these eggs?

Email our donor egg coordinator at