First answer the question in the title:
Transferring embryos is not arbitrary, but depending on everyone's physical condition!
And the purpose of doing test tubes is simple:
Have a baby, not multiple babies!
In general:
If the embryos are of good quality, or if the blastocysts are transferred, in this case only 1 is usually needed;
If the quality of the developed embryos is not good, 2 embryos will be transferred according to the physical condition of the sisters.
Let's take a closer look at which groups of people
Suitable for singleton transplantation,
Which groups of people are suitable for twin transplantation.
Singleton is suitable for people:
For those with an age ≤ 35 years, 3 high-quality embryos ≥ and a good uterine environment, it is recommended to choose singleton transfer;
The first test tube is successful and the mother who has a healthy baby and intends to have a second child;
Suffering from congenital uterine malformations, such as a unicorn uterus, mediastinal uterus, etc., it is recommended to transplant a single fetus to reduce uterine pressure.
Twins are suitable for people:
Elderly, poor embryo quality IVF mothers, under the condition of physical conditions, can consider transferring 2 embryos;
IVF mothers who have failed multiple transfers and are in poor physical condition may choose to transfer 2 embryos;
The ultimate purpose of the test tube:
Let's interpret it again: ensuring that singletons, term, and live births are the ultimate purpose of IVF fertility treatment.
Physiologically speaking:
The uterine environment is more suitable for an embryonic development. Selective single embryo transfer is to choose a good transfer among all embryos, which can not only ensure a certain pregnancy rate, but also reduce the risk of twin pregnancy.
From the psychological point of view: everyone hopes that good things will become pairs, once two, but the reality is not so ideal, and the risk brought by twins is also very large, so one is good! From the doctor's point of view: the number of embryos transferred, need to be analyzed specifically, not want to move a few can be transferred a few, I hope you understand! Special attention: embryo transfer needs to be fully evaluated, listen to the doctor's professional advice, must not do whatever you want, blindly demanding, I wish everyone a good pregnancy!