This procedure involves removing the mature eggs (ova) that are produced in your ovary and transferring them to the laboratory so that they can be fertilized with your partner’s or donor’s sperm cells (spermatozoa). At this stage we put the embryos obtained in culture mediums for between two and five days until we decide to transfer them (a maximum of three) into your uterus where they continue to develop.
The other embryos left over, which are considered to be viable, are then cryopreserved so that they can be used later on in another cycle if you so wish, or you can donate them to other couples or for research, in accordance with the Spanish Law on Assisted Reproductive Techniques.
If sperm is also needed for this procedure, bear in mind that all the donors are of legal age, they are chosen according to their blood group and the physiological characteristics of the recipient, they are anonymous and they have been fully examined to make sure that they have no congenital, genetic disorder or sexually transmitted disease.
To a great extent, the success of this technique depends on the woman’s age, the number and the quality of eggs obtained, the sperm sample and the development of the embryos. In general, the pregnancy rate per cycle is between 40% and 65%, although this figure rises to over 70% for women who are younger than 32.
These percentages can be modified depending on the age of the patient and the specific conditions of every woman. All the cases are analyzed personally by the Unit, looking for the highest percentage of success rate for your pregnancy.