Double is a double joy for mom. However, pregnancy with twins can have a number of features and even complications, and much in its current depends on whether the twins result in the separation of one zygote in the second week of pregnancy, or it will be about fertilization of two independent eggs or early separation.
Types of twins
Twins have four main types that can arise as a result of two variants of conception. The first variant of conception, which has a single subtype, is the fertilization of two ovules simultaneously. As a result, a bichorial diamiotic twins is born, which has separate chorions and separate omnions (located in different placentas and in different amniotic sacs). Such babies can have different sexes and even different looks.
In addition, there is another version of conception. In the mother's body, only one ovum ripens, which is fertilized by one spermatozoon, but as a result of division it forms two full eggs at once. Depending on the day on which the division takes place, one of three types of twins is formed. They may have a separate chorion and omnion, but only if the division occurred literally in the first 48-72 hours after conception. If conception occurred later, they may have a common chorion and separate omionions or a common chorion and a common omnion. In the last two cases, the twins are called still odnoyaytsevymi, they will necessarily be of the same sex and will be similar to each other as two drops of water, not only externally, but also a set of chromosomes.
Bihorial twins
Experts believe that it is biamnotic twins for the health of the mother, as well as for the twins themselves, which is the most preferred variant of the development of events. By frequency, it takes about 25-30% of the total number of twins. Toddlers develop separately from each other, eat from a separate placenta, and therefore better provided with everything necessary for growth and development. Such twins usually have a small difference in weight and are born almost full. They have less frequent developmental anomalies and fewer problems in the course of gestation.
In addition, such a pregnancy has a minimal risk of complications for the mother. In some cases, if both babies lie correctly, specialists can allow mother to give birth on their own, sometimes it happens that babies are born even with a difference of several days. Of course, two toddlers for mom are a great load, but also a great happiness. As a rule, the birth of a double dichorial is inherited, so if the mother in the family already had twins, then the likelihood that she is carrying a dichoric twins is increased. Monochorionic twins can appear in any family and depend only on the course of the process of separation of babies. Other factors play little role here.
To determine which kind of mother is dichoric or monochorionic, it can be done on a special study, for example, during a chorionic or amniocentesis biopsy. On an ordinary ultrasound, find out this question
Today, experts are well aware of what kind of twins are, can determine on an expert ultrasound, which mother of the placenta is double or single, and also talk about how the babies develop and whether they have any problems in growth. If necessary, Mom may be assigned special supportive drugs, which will help her communicate to both children.