Semi-identical twins
In addition to identical twins and twins, an intermediate variant is possible. These are the so-called semi-identical twins, which are also monozygotic. In this case, the most important difference between twins and twins, namely - the unipolarity of these children can be refuted.
The mechanism of the formation of such pregnancy is quite complex because for her mature ovum should have a "polar body", which later should be self-marked. If this process does not take place, then this cell takes on the role of another egg, which can be fertilized. Both cells can be fertilized with either two or one sperm. In another variant, one egg is fertilized with two sperm cells, if the egg has been divided before the fast male cells reach it.
It is such a complex series of coincidences that can lead to the birth of semi-individual twins, which at full resemblance can be different sexes. The similarity of the genotype of such twins is about 75% because children have the same genes of the mother's egg and half of the father's genes.
If in other cases, the key difference between twins and twins, which concerns their sex and appearance, is of fundamental importance, when conception of semi-identical twins, we can observe an intermediate version, when apparently very similar children can be (and may not be) of different sex or race.
Digital twins or twins
And if we have already realized the main difference between twins and twins, it is worth considering the other side of the question. Or rather - what are the signs that distinguish the twins, or how to correctly call these kids - the digitally twinned twins.
As you remember, this pregnancy is obtained when a woman at the same time mature two or more eggs. They are fertilized with two different sperm cells. As a result, children are born who are similar to each other, as well as siblings born at different times. However, if we summarize the facts, the twins and twins, the difference between which we are interested in, differ as follows:
- In children from twins coincides on the average about half of the genes, more often about 40-60%.
- Each of the embryos is formed by the fusion of different eggs and different sperm cells.
- Both babies have their own bubble and placenta.
- Children can be either heterosexual or same-sex.
- When transplanting organs and tissues, one of the twin twins is considered on an equal footing with other relatives, and not always possible.
- The birth of digital twins can be influenced by known factors in science and their occurrence can be predicted and even - to plan, what can be read here.
- It is twins resulting from IVF, when a woman is planted not one, but several fertilized eggs.
- Twins can be similar to each other, and radically different features of the face, the color of the ox and eyes, the color of the skin and body composition.
- Children of their digital twins may have different blood groups.
Diagnosis of twins or twins during pregnancy
When the doctor who leads your pregnancy, pleases you with the news that you are waiting for two babies at once, your heart stops to beat with new strength. But then you wake up and curiosity - boys, girls or heterosexuals? Twins or twins?
Of course, in the first few weeks of pregnancy, a doctor will only be able to diagnose a larger uterus than a normal pregnancy and two beating hearts. However, the situation becomes absolutely transparent on the ultrasound, where at 4-5 weeks you can be 100% sure that the pregnant woman is expecting twins.
But whether they will be identical twins or twins - is a surprise until the birth, if the babies are not heterosexual and were not the result of IVF. In recent cases, you can be absolutely certain that the expected babies - twins.
Twins and twins - similarities and differences
Comparing the parameters of the difference between twins and twins, do not forget about their propensity and character. It is also necessary to take into account the social environment, environment, the desire of the kids themselves to be similar to each other or, conversely, the protest and desire to show their distinct individuality. These factors strongly influence whether the toddlers will be similar to each other.
First of all, for close people and parents make sense only to the medical parameters of what the twins differ from twins. This helps to better understand what is happening to the babies and why. Will children be similar as two drops of water, or different, as if not native - in any case, - in any case, do not forget that each child - a separate person, with their own goals and desires.