Odnoyaytsevye and raznoyaytsevye twins

The babies that a woman gave birth as a result of one pregnancy are called twins. Such children cause genuine interest among their peers and even adults. After all, cases of multiple pregnancy are much less common than singleton. There are odnoyaytsevyh and raznoyaytsevye twins. They are also called monozygotic and dizygotic. Different factors influence their conception. It is noted that such male children are born more often.

Difference between identical and dissimilar twins

Monozygotes appear in the light, if several spermatozoa fertilize one egg, which splits into two or more halves. They develop separately, they may have common or different placentas. Such children have the following features:

• they are necessarily of the same sex;
• outwardly they look absolutely identical;
• they have completely identical fingerprints;
• they have the same blood group;
• they are usually similar in temperament, temperament;
• they are predisposed to the same diseases.

All this is explained by an identical set of genes. Actually, what are they different from identical twins from raznoyaytsevyh, who have different genotype.

But in some cases, mirror features in appearance are possible. For example, one of the children may be right handed, and the second left-handed. The concept of dizygotic originates from individual eggs fertilized by different spermatozoa. This can happen if several eggs are ripened in a single cycle in the female body. There are a number of reasons for this. Children have a different appearance, character, temperament. It can be crumbs, as one, and different sex. These are just brothers or sisters who were born on the same day. Odnoyaytsevye twins are born less often raznoyaytsevyh and make up about a third of the total.