What does it involve?


This technique is recommended when the sterility factor is caused by problems arising when the patient’s eggs are scarce and/or of low quality. This may have different causes:

  • Congenital or acquired absence of ovaries
  • Premature menopause
  • Chromosomal abnormalities passed on to descendants
  • Lack of ovarian stimulation
  • Recurrent IVF failure
  • Recurrent miscarriages

In Spain, the Law authorises this technique, which is anonymous, altruistic and voluntary. 

Selection of donors

Donors are healthy women of 18 to 35 years of age who wish to help other women to become mothers. All candidates must have a good psychophysical health and full capacity to act. 

We carry out different test to prove that they don't suffer any genetic, hederitary or infectious dieases that can be transmitted to the offspring. As recommended the Spanish Feritlity Society (SEF), one of this tests is the Basic Genetic Screeing which determines if the donor is a carrier of pathogenetic variants such as Cystic Fibrosis (CFTR), Muscular Spinal Atrophy (SMA), Non- Syndromic Neurosensory Hearing Loss (GJB2), higher prevalence Hemoglobinopathies and Fragile X. 

In addition we also carry out the Extended Genetic Screeing (Carrier Test) this test compares a high number of pathogenetic variants of the donor with the patient's partner and by matching their variants we are able to dtermine if the oocyte donor and the patient's partner carry the same mutations. The Extended Genetic Screeing also include all of the Basic variants. 

The eggs obtained from the donor are inseminated with semen from the recipient patient’s partner in order to obtain the embryos, which are transferred to the recipient’s uterus.

Prior to this transfer, the patient must receive mild hormonal treatment in order to prepare the uterus and facilitate implantation.