Carrying more than one fetus per pregnancy is referred to as multiple pregnancy. It happens commonly that parents, seeking fertility treatment in IVF are finally gifted with twins. While surrogacy may turn out as an unexpected and extremely pleasant surprise, it is logical to be curious about the connection between surrogacy and multiple pregnancies.
Despite trying to make IVF prices as affordable as possible, the procedure is still not cheap. Moreover, not every transfer is a guarantee of success. Transferring one embryo at a time is not always the best practice. The procedure might need to be repeated until the baby is finally brought to world. To protect intended parents from extra costs and stress from unsuccessful transfers, it is highly suggested to transfer more than one embryo at a time. The number of transferred embryos can be two but not more than three. This also depends if day three or blastocyst embryos are transferred. With blastocyst the number of embryos to transfer to the surrogate mother is limited to two.
Dozens of factors play role in IVF success, however, to evaluate generally, healthy surrogate mother and embryo are of major importance.
The factor to consider is that before the agency assigns surrogate mother to the program, her physical and mental health is checked several times. Various tests and medical checkups have to confirm that surrogate is absolutely healthy and ready for a successful pregnancy.
On the other hand, before the transfer, quality of embryos is graded too. Evaluation gives the possibility to transfer only those that have the highest chance of successful implantation and development.
Combining this knowledge with the possibility that all of the transferred embryos manage to survive and implant successfully, the IVF procedure will finally result in a multiple pregnancy.
There are no guarantees that all or any of the embryos will survive. However, transferring multiple numbers of healthy embryos has higher potentials of successful IVF.