Why test tube babies are easy twins
Since the advent of IVF technology, more and more couples have realized their parent-child dreams in this way. However, compared with natural pregnancy, IVF is more likely to produce twins. The following will explain why IVF is easy to be twins from four aspects: embryo selection, embryo segmentation, hormone regulation and multiple pregnancy success rate.
Embryonic selection
In the process of IVF, embryo selection is a crucial step. To increase the success rate, doctors usually implant multiple embryos in the mother. When all these embryos are successfully implanted and developed, multiple pregnancies will occur. Different from natural pregnancy, multiple pregnancy in IVF is not because multiple eggs are fertilized at the same time, but because doctors select multiple embryos when transferring embryos.
First, in the process of IVF treatment, in order to improve the success rate, doctors will cultivate multiple fertilized eggs in the laboratory. Then, select embryos with high development and implantation potential for transplantation. This selection strategy increases the possibility of twins because it is impossible to predict which embryo will eventually develop successfully.
Secondly, in IVF technology, doctors usually implant two or more embryos in the mother to increase the possibility that at least one embryo can be successfully implanted. However, this also increases the risk of simultaneous implantation of multiple embryos, which further leads to the occurrence of multiple pregnancies.
Embryo segmentation
Embryo segmentation in IVF is also one of the important reasons for twins. Embryo segmentation refers to the division of a fertilized egg into two or more independent embryos at the early stage of fertilization embryo development.
This segmentation can be carried out in different ways, such as cell division, embryo separation, etc. When the segmented embryo is successfully implanted, multiple pregnancies will occur. Therefore, the embryo segmentation technology in IVF also directly increases the probability of twins.
Hormone regulation
During IVF, doctors will use hormone regulators to help patients' ovaries produce multiple follicles. In this way, more eggs can be collected for fertilization and embryo culture.
However, the use of hormone regulators will stimulate the ovary to produce multiple follicles, thus increasing the chance of multiple eggs being fertilized. If multiple eggs are successfully fertilized and developed, twins will be born.
Multiple pregnancy success rate
Finally, it is worth mentioning that the success rate of multiple pregnancies in IVF is relatively high. The success rate of multiple pregnancy is usually higher than that of single pregnancy, because multiple embryos are more likely to be implanted at the same time.
This is one of the reasons why doctors prefer to implant multiple embryos during IVF. Although multiple pregnancy increases the risk of pregnancy and delivery, many patients are still willing to accept this risk, hoping to achieve a successful multiple pregnancy at one time.
Summary
To sum up, the reasons why IVF is easy to be twins mainly include embryo selection, embryo segmentation, hormone regulation and the success rate of multiple pregnancies. These factors interact with each other, making the probability of multiple pregnancy in IVF higher. Although multiple pregnancies increase the risk, for some couples who want to have twins, IVF technology is still the best choice for them to realize their parent-child dreams.
