In recent years, IVF has received more and more attention, and people can easily find that IVF has some incredible characteristics, such as the probability of IVF twins being particularly high.
So, what are the odds of ivy baby twins?
At present, the global annual birth rate of twins and multiples has reached 20% in some countries with high birth rates.
According to IVF experts, under normal circumstances, the probability of multiple pregnancies is about 1% to 2%.
But for women undergoing IVF, the likelihood of multiple pregnancies increases a lot, including twins, triplets, quadruplets, and even more.
According to our preliminary statistics, IVF twins and multiples can reach 20% to 25%, which can be higher for technical experts.
Simply giving data may not be convincing, and more cautious people tend to be suspicious, so why is the probability of IVF twins higher?
We can first understand the reasons for the high probability of IVF twins, and we can know that it is not unusual that the probability of IVF twins is high.
IVF technology is actually in vitro insemination - embryo transfer technology, IVF process will first be the eggs and sperm removed from the human body, in the artificial simulation environment to complete the process of combined fertilization, the fertilized egg is initially cultured into an embryo, and then transferred to the woman's uterus.
But it seems that this process does not seem to have factors that can make the probability of IVF twins higher.
In fact, there are two key factors that lead to the odds of IVF twins:
One is the ovulation induction step; the other is the number of embryos transferred at the same time.
If you follow the normal situation of a woman, only one egg at a time matures to carry out fertility, it will take a lot of time and effort.
Therefore, through the step of ovulation induction, the eggs that the woman did not have the opportunity to mature in each physiological cycle will also mature, so that the woman can provide multiple mature eggs at once.
The next process believes that the clever reader has been able to guess that because there are multiple mature eggs, it is possible to cultivate multiple embryos at once, and when the embryos are transferred, multiple embryos can be transferred at the same time, as long as two embryos implant successfully, they are pregnant with twins.
However, due to the fact that they are fraternal twins, it is not uncommon for IVF to give birth to a dragon and phoenix fetus.
Although twins have always been popular, doctors say that twin pregnancies are more risky than singletons, so they are not suitable for everyone, and should be applied on a case-by-case basis.
Compared with singleton pregnancy, the possibility of hyperemesis gravidarum during early pregnancy in twin pregnancies is greater, and in the middle and late stages, the risk of hypertensive diseases, miscarriage, premature birth, etc. during pregnancy is significantly increased, so it is not that the more embryos transferred, the better, to follow the doctor's instructions.
However, at present, in order to improve the success rate of test tubes, many reproductive hospitals are still based on the transfer of 2 embryos, and are gradually carrying out selective single blastocyst transfer, single embryo transfer is not blindly recommended for all patients, and currently for patients with ideal conditions, including the transfer of 2 patients who may have twin pregnancies, or some patients who cannot withstand twin pregnancies due to height, weight, or uterine abnormalities.
We recommend selective single embryo (single blastocyst) transfers to ensure their pregnancy rate and reduce the risks of pregnancy. Therefore, before recommending a single embryo (blastocyst) transfer, we will conduct a comprehensive and full assessment of the patient, and our goal is to give birth to a singleton, term and deliver a healthy baby.
For patients with slightly worse conditions, such as advanced age, poor ovarian reserve or patients with uterine fibroids, adenomyosis, etc., these unfavorable factors will affect the implantation rate of embryos, so in this case, 2 embryos will still be transferred to increase their chances of pregnancy.