The birth of a child is an unusual, bewitching moment. The whole life of a young mother begins to revolve around a small miracle that has come into the world. And if a woman is given two (or more) babies, then happiness becomes more.
The birth of twins brings with it excitement, the upcoming chores of care, sleepless nights, but the moment of the birth of children is filled with happiness.
Types of twins
If a woman has a multiple pregnancy, then she will have twins. Children can be both exactly the same, and generally a little similar, and even of different sexes. It all depends on how the egg was fertilized. Depending on this, the twins are divided into:
- identical (monozygous);
- fraternal (dizygotic).
Identical twins
The birth of two absolutely identical children remains a mystery to mankind. Why at the initial stage the egg begins to divide and create identical embryos remains unknown.
Monozygous twins are the result of the fertilization of one egg by one sperm. The resulting diploid cell begins to divide,resulting in independent embryos. More often there are two, but there may be more. The similarity of future babies from such a pregnancy is determined by the time of separation of the embryos. If it happened in the first 5 days, then the embryos each have their own placenta and amniotic sac. In this case, there will be minor differences in the appearance of future babies. If the separation occurred after the fifth day, then the embryos have one common placenta and their similarity to each other becomes absolute.
Fun fact: Monozygotic twins most of the time have identical fingerprints.
The reasons for the division of the zygote into two or more identical embryos have not yet been studied. The probability of having identical babies is 3 in 1000 and does not depend on heredity.
fraternal twins
The conception of such twins is obtained as a result of the fertilization of two eggs by different spermatozoa. During intrauterine development, each embryo has its own placenta and develops independently of the other. Dizygotic twins can be either same-sex or opposite-sex. They will have an outward resemblance, like brothers and sisters born from a normal singleton pregnancy.
Fraternal twins can be conceived hours apart, and possibly even days apart.
Features of the development of dizygotic twins
The following facts about born fraternal twins are known:
- their genes share about 40-50%;
- eachthe embryo has its own placenta and its own amniotic fluid;
- born babies can be both same-sex and different-sex;
- children can have different blood types;
- the likelihood of their occurrence increases in women over 35;
- As a result of the IVF procedure, twins most often appear, since several fertilized eggs are implanted in a woman.
Is it possible to plan for the birth of twins?
The birth of a child is an unusual, enchanting feeling that arises in a young mother who gave birth to a child. And the birth of twins (twins) further contributes to the feeling of happiness. However, it is impossible to schedule their appearance.
When an egg is fertilized, information is immediately laid down both about the future baby and about what kind of pregnancy it will be - singleton or multiple, so it is impossible to influence this process in a natural way. One can only find out the factors that increase the likelihood of twins.
These factors include:
- pregnancy aged 35-39;
- the presence of twins in a generation (the appearance of identical ones is not associated with hereditary factors. To date, it has not been studied why and under what conditions the egg begins to divide);
- short menstrual cycle (20-21 days) - with such a cycle, the likelihood of multiple eggs maturing increases;
- fertility treatment. In the treatment of infertility, hormonal drugs are used that stimulate maturationeggs and ovulation, resulting in multiple pregnancies;
- in vitro fertilization, often resulting in twins or even more babies.
Differences between twins and twins
You can summarize how identical twins differ from fraternal twins. Consider the characteristic features that babies born with multiple pregnancies will have.
Identical twins:
- Children have an identical similarity, but in some moments it can be mirrored. For example, a mirror image of existing moles.
- In addition to the external similarity, the physique, hair structure, teeth arrangement, voice timbre, and even thoughts are quite similar.
- Have the same blood type and most often have similar fingerprints.
- Always same-sex, also known as natural clones.
- It is impossible to plan the birth of monozygotic twins.
fraternal twins:
- There are both same-sex and different-sex.
- May have different blood types.
- External resemblance is superficial.
As you can see, there is no similarity between identical and fraternal twins, only one name - "twins". At the same time, it is customary for people to call identical babies twins, and fraternal babies - twins, triplets, etc. The differences between them begin to appear from the moment of conception.
Conclusion
The appearance of two or more babies as a result of one pregnancy brings with it increased attention of people around to children. At the same time, fraternal twins look like ordinary brother and sister (2 sisters or 2 brothers), so they do not attract close attention.
Identical twins are always of interest in society. Most likely, this is due to the rarity of such an occurrence. Therefore, seeing two absolutely identical people, a passer-by will definitely stop his eyes on them.
At the same time, you need to know that multiple pregnancy is observed under special control, since the body experiences a greater load than during normal pregnancy. The future mother should be attentive to her he alth. Therefore, in order to give birth to he althy twins, it is necessary to listen to the doctor's recommendations, then the moment of meeting with the babies will be filled with only positive.
