In Spain, 1 in 6 couples of childbearing age to have children and can not, so go to a fertility clinic, where multiple pregnancy rate is 30% compared to 1-2% of twin pregnancies achieved naturally.

"After a while trying to get pregnant without success, most patients get a little tired and discouraged the In Vitro Fertilization (IVF) so you do not want to hear about single embryo transfer, they want to say two to increase the chances of success and look forward because even they have twins, "says Dr. Antonio Requena, medical director of IVI Group.

Many couples view multiple pregnancy as desirable, ignoring the danger that entails for both the mother and newborn. The main problem is preterm birth, ie before 37 weeks, a circumstance that occurs in more than half of deliveries in kind and that can lead to impaired psychomotor development, especially in large infants (weighing less than to 1,000 grams).

In addition, the medical community are well-known aspects that accompany a multiple pregnancy for the mother, preterm labor may require rest and even hospitalization, the need for caesarean section is much more common and all linked to increased complications such as hypertension, polyhydramnios (excess amniotic fluid) and gestational diabetes, among others.

These are some of the reasons leading specialists IVI to target a healthy child through a single embryo transfer, thus reducing the chances of multiple gestation. As Dr. Requena said, "this practice does not lessen the chances of pregnancy, especially when it comes to women under 35 with a good prognosis."

This is the case of Carlos and Paola, after several abortions and after diagnose polycystic ovary syndrome, came to the clinic where IVI underwent IVF with transferring two embryos. "After a year of trying without achieving the baby was the concern and frustration, as I wanted to be a mother and I took the risk, despite being reported in the IVI of the possible complications involved a gestation of these characteristics." Now Alessandro and Flavio have a year and his mother recalls, "was indeed a difficult pregnancy and delivery by the problems that could have warned me and actually had."

The aim of the current reproductive medicine is to achieve a healthy child at home, not two, hence all the efforts in the medical landscape is routed to humanize European assisted reproduction resembling the natural conception.

"You try to avoid twin pregnancy improved techniques that allow to select the best embryo: study every second of embryo development with the help of embryoscope (the first film incubator), vitrification of gametes and embryos, and metabolomic analysis of the embryo are the key to achieving "