How are twins born in pairs? Can test-tube babies create twins in pairs?

Many newlyweds envy parents who have twins or boy-girl twins. When they are preparing for pregnancy, many of them probably imagine that they are pregnant with twins or boy-girl twins. So, how are boy-girl twins formed? What is the probability of boy-girl twins?

The formation principle of twins

Boy-girl twins are a relatively special type of twins. Twins can be divided into two categories: identical twins, which, as the name suggests, are two children born from the same fertilized egg; and fraternal twins, which are two children born from two different fertilized eggs. If it is identical twins, the possibility of having boy-girl twins is zero; if it is fraternal twins, there is a 50% chance of having boy-girl twins.

The secret of having twins

There is a kind of envy, called other people's twin babies, there is a kind of admiration, called other people's twin boys and girls. Although having a boy or a girl depends on fate, welcoming two babies at the same time, getting both a boy and a girl at once, and suffering twice the result with half the effort is also a blessing that makes people envious and jealous. Although the chance of having twin boys and girls is very small, it is not impossible to work hard. The "secret" to having twin boys and girls is quickly presented! If you want to have two at one stroke, take a look.

▌Secret to having twins: Find someone with twin genes

▌Risk Index: ☆☆☆☆☆

The survey shows that women who are twins have a higher chance of giving birth to twins than ordinary women. In addition, if the man is a twin, the wife's chance of giving birth to twins is also higher than the average person. However, these two situations do not have a big impact on giving birth to twins, which is only slightly higher than the average population.

It is difficult to find a boy-girl twin who is your age, suitable for marriage, and a boy-girl twin in the vast sea of ​​people. However, it is better to have this chance than not. If you have a boy-girl twin partner and want to have a boy-girl twin baby after marriage, what are you waiting for? Hurry up and register to have a baby!

▌Secret 2 for having twins: folic acid supplementation

▌Risk Index: ★☆☆☆☆

Experts estimate that folic acid supplements may increase the frequency of ovulation, allowing multiple eggs to enter the uterus, thus producing twins. However, whether this conclusion is correct remains to be confirmed by further research.

As we all know, women will release one egg on the day of ovulation every month, and in rare cases, two eggs will be released. The prerequisite for having twin boys and girls is that women must release two eggs on the day of ovulation, which is very difficult to achieve. Experts believe that folic acid supplements have a certain effect on increasing the number of ovulations in women. Therefore, if you want to have twin boys and girls, it is best for women to take folic acid to increase the chance of releasing two eggs.

▌Secret 3 of having twins: IVF

▌Risk Index: ★★★☆☆

"Test-tube baby" is a method of promoting the development of follicles in a woman's ovaries through ovulation induction technology, then removing the eggs for in vitro fertilization, and then transplanting the developed embryos into the uterus for gestation.

Because this process is carried out under the artificial control of the doctor, in order to ensure the quality of the fertilized eggs, several eggs are generally selected for fertilization. When they develop to a certain extent, the best 2-4 eggs are selected to be implanted in the mother's uterine cavity. Finally, the best embryo is retained to allow it to implant and develop in the uterus until the fetus is born.

However, some women's physical conditions allow two embryos to develop at the same time. If they also request it, doctors can retain two embryos for them, thus giving birth to twins.

▌Secret 4 of having twins: increasing hormones

▌Risk Index: ★★★★☆

The "secret recipe for twins" was once very popular among the people of Sichuan. According to research by scientific researchers, most of these so-called secret recipes are drugs that can promote gonadal hormones.

The main effect of this type of drug is to stimulate the anterior pituitary gland to secrete gonadotropin, which can induce ovulation after taking the drug. This type of drug is also used to treat infertility. If healthy women take it improperly, they may experience adverse reactions such as abdominal pain, breast swelling and pain, nausea, dizziness, fatigue, rash, blurred vision, and severe cases may cause cancer.

▌Secret 5 for having twins: Ovulation-stimulating drugs

▌Risk Index: ★★★★★

Xinhua News Agency once published an article about "Oral ovulation-promoting drugs increase the chance of having twins", which pointed out that the number of "artificial" twins is increasing significantly, and doctors are deeply worried about this phenomenon. In fact, the effect of ovulation-promoting drugs is similar to that of folic acid, but the effect is better.

After using ovulation-inducing drugs, women do have a high chance of ovulating two eggs on the day of ovulation, but this drug intervention is unnatural and very harmful to the female body. In addition, the twins born in this way will inevitably have health risks. Therefore, experts recommend that women do not take this method that harms their bodies just to have twins.

Can IVF produce twins of different sexes?

Can IVF produce twin boys and girls? IVF is an assisted reproductive technology that treats infertility, but some patients consult IVF for twin boys and girls. Experts say that IVF can technically select the gender of the baby and can produce multiple pregnancies. The following is a detailed introduction.

In vitro fertilization twins: Technically it is possible to select gender and achieve twins

Can IVF produce twins? Experts point out that the gender of the child can be selected from the IVF technology. There is a technology called PGD (preimplantation diagnosis) in IVF technology that can be used for gender identification. PCD technology uses the embryos formed by the sperm and eggs of the couple to take out a cell from the embryo for genetic and chromosome examination before placing it in the uterus, which can identify the gender of the baby.

In addition, in order to ensure the success rate of in vitro fertilization technology, 2-3 embryos are generally transplanted during embryo transfer, so that twins can be achieved.

IVF twins: not allowed by law

Although PGD can be used to select the sex of a test-tube baby and achieve twins, it is not available to all test-tube babies. It is limited to patients with genetic diseases, including couples with sex-linked genetic diseases, in order to achieve the purpose of eugenics and avoid the birth of sick children.

In addition, if the patient is pregnant with multiple babies, the mother of multiple babies is more likely to develop pregnancy-related syndromes such as diabetes and hypertension during pregnancy, and the probability of postpartum hemorrhage is also high, and premature birth is also more likely to occur.

However, our country's laws prohibit the illegal selection of fetal sex. In vitro fertilization technology cannot be used at will for sex selection or multiple births.

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