Why is it possible to conceive twins?

The woman must have 2 eggs simultaneously in the same menstrual cycle and both eggs are conceived by 2 different sperm, this situation is extremely rare.

Recently a father in Hoa Binh sent two twins to DNA testing and the unexpected result was only one of his children. Deputy Minister of Health Nguyen Viet Tien said that this is a rare case, it is necessary to rethink the pregnant woman with eggs or pregnant with another egg, reassessing the new gene has the correct answer.

According to Vice Minister Tien, twins or twins are a common phenomenon of multiple pregnancies , when the mother gives birth to two babies in the same pregnancy. Two twins may be similar in sex and appearance but may also be completely different in both gender and sexuality. This depends entirely on the pregnancy of the mother who is twins with the same egg or other twins.

Twins or twins are common multiple pregnancies.(Photo: albanydailystar.com).

According to medicine, egg-identical twins are a phenomenon in which an egg is fertilized by a sperm and split into two during the development of zygote and develop into two separate fetuses. The fetus in this case is the same as water droplets in both form and gene structure. Two babies also often have the same gender.

Other twins are when a woman loses 2 eggs simultaneously in the same menstrual cycle and both eggs are conceived by 2 different sperm. In this case, the two fetuses share the mother's uterus for nine long months but develop in completely different directions. In the case of other egg twins, it is possible that the father of two babies is not a person.

In the world there have been several other twins. Experts can only explain this rare fact: When a mother loses many eggs in the same menstrual cycle and relates to more than one object, each egg can be fertilized by another man. each other, leading to big differences of twins. Even two twins may not be born with one birth.

In some cases, the pregnant mother once again conceived when an egg fertilized with another sperm in the same month. This phenomenon is called a different period of fertilization. That happened after a few weeks after the first zygote was formed. It also explains why when born, a twin will be larger and more mature than the other baby.

Biologically, a woman can conceive a different egg twins with two different men when pregnant and ovulate again. A fetus forms when a second egg is fertilized by a sperm from another man.

This is similar to the triplets including an identical twins and a different baby than the other two. You may know twins with eggs due to their identical appearance, while the other twin eggs look like other siblings. This is the reason that placental membranes are checked very carefully. The placenta or DNA test will tell if this is the same twins or eggs. However, not all results are completely accurate.

According to Vice Minister Tien, the case of pregnant women is more common in IVF fertilized people. The success rate of IVF cases is only about 35-40%, so in order to increase the likelihood of success, doctors who perform IVF will transfer more than one embryo into the woman's uterus, so there will be case of twins and triplets.

Sometimes due to anxiety failing to do IVF, many couples suggest doctors fertilize an egg with sperm from the bank to form an embryo. These two embryos are inserted into the mother's uterus to develop into a fetus, fortunately both embryos develop well and the mother gives birth to two healthy babies. In this case, the twins will have a baby with DNA from their father's sperm and a baby carrying DNA from the donor's sperm.