Fertilab

Normally, there is a delay of about 2 years in the publication of these statistics due to the difficulty in data collection and the controls that are carried out. It should be noted that, to collect data from a gestation achieved in December 2017, we must wait until delivery, which will be approximately in September 2018.

It should also be taken into account that directly comparing pregnancy rates between different clinics can lead to misunderstandings because there are many factors that influence the results, such as the cause of sterility or the particular characteristics of each treatment.

Therefore, the SEF data shown below should be taken as a mere guide. In addition, we recommend reading this article for a better interpretation of the statistics.

The SEF does not provide an exact number of annual cycles that each center performs, but rather it does so in the form of ranges as follows: less than 100 annual cycles, between 100 and 500 annual cycles, or more than 500 annual cycles.

From inviTRA we consider that for a better interpretation of the results it would be good that the SEF provides more exact data or smaller ranges for the number of annual cycles.

This is the total number of cycles performed by Fertilab in a year.

This success rate refers to the probability that a transferred embryo will nest in the woman's uterus. It is calculated as follows: number of gestational sacs observed on ultrasound divided by the number of embryos transferred.

The SEF shows this value in the form of an interval, since it is very complicated to provide an exact percentage due to the variability of factors that we have already discussed.

It should also be taken into account that the more assisted reproduction cycles the clinic performs, the narrower this interval will be and the better the interpretation.

Below, we show the implantation rates per embryo transfer in Fertilab.

This success rate refers to the probability of pregnancy for each embryo transfer, regardless of the number of embryos transferred and the type of gestation obtained, that is, whether it is a single or multiple gestation.

The SEF divides this success rate according to the woman's age and is also shown in the form of an interval, so it is likely that very large intervals will be found in clinics that perform few cycles.

These are the pregnancy rates per embryo transfer obtained by Fertilab.

According to Law 14/2006 on Assisted Human Reproduction Techniques, in Spain it is only permitted to transfer a maximum of 3 embryos at each attempt.

Even so, a higher percentage of single-embryo transfers is now considered a quality parameter for clinics, since although transfers of two or three embryos increase the rate of gestation, twin or multiple pregnancies have many risks for the mother and babies and must be avoided at all costs.

The recommendation of inviTRA is to transfer only 1 or 2 embryos whenever possible.

In Fertilab they have the following percentages in terms of number of embryos transferred.

As we have said, a single gestation is the best result that can be obtained after an assisted reproduction treatment.

In the following graphs, the percentage of each type of gestation obtained in Fertilab is shown according to the number of embryos transferred.

Due to the risks associated with multiple pregnancies (lower birth weight, higher probability of premature birth, etc.), the ideal would be to always obtain a single gestation rate of 100%, regardless of having transferred 1, 2 or 3 embryos.

As far as egg donation is concerned, these are the ranges of annual cycles performed by Fertilab.

As we have indicated above, the SEF does not provide the exact number of cycles performed by a center and that makes it difficult to interpret.

The probability of a successful egg donation is usually higher than that of IVF with own eggs.

Taking this into account, these are the implantation rates obtained in Fertilab for IVF with donated eggs.

In the case of egg donation, the probability of achieving a pregnancy does not depend so much on the age of the recipient woman. Still, the SEF divides this success rate equally into age ranges.

It should also be noted that the current trend is to perform IVF with frozen donor eggs rather than fresh ones.

These are the pregnancy rates by embryo transfer obtained in Fertilab for egg donation.

Given the high probability of achieving a pregnancy with donated eggs, it is always preferable to transfer a single embryo in this treatment in order to avoid a multiple pregnancy.

In Fertilab the embryos resulting from egg donation are transferred in the following manner.

Finally, these are the types of pregnancies achieved by Fertilab according to the number of embryos transferred in egg donation IVF.

This success rate refers to the probability of achieving a pregnancy for each artificial insemination performed.

The SEF divides this success rate according to the woman's age and is also shown in the form of an interval, so it is likely to be found with very large intervals in clinics that perform few cycles.

Below are the pregnancy rates per cycle obtained in Fertilab.

Single gestation is the best result that can be obtained after an assisted reproduction treatment, either by artificial insemination or by in vitro fertilization.

In the following graphs, the percentages of each type of pregnancy obtained in Fertilab are shown for each pregnancy achieved with artificial insemination. These data are also divided according to the woman's age.

Due to the risks associated with multiple pregnancies (lower birth weight, higher probability of premature birth, etc.), the ideal would be to always obtain a single gestation rate of 100%.

To show the pregnancy rate of donor artificial insemination, the SEF divides the results according to the woman's age.

These are the probability intervals of pregnancy achieved by Fertilab for donor artificial insemination.

As for the type of pregnancy obtained after getting a positive result with donor artificial insemination, these are the data obtained by Fertilab according to the woman's age.

It is worth noting the risks that a multiple pregnancy entails for both mother and babies, so the ideal result in any assisted reproduction treatment is a single gestation.