Do you have any familiar twins? Or maybe you are a twin? It's an amazing phenomenon, right? Genetics and medicine are engaged in its study constantly, and at the same time there is still a lot of unexplored in this matter.
The same facts that have already been revealed to science, we hasten to share with you.
1. Since 1980, the number of births of twins has increased by 70%.
2. 30-year-old women give birth to twins more often than 20-year-olds. More precisely, the later a woman becomes pregnant, the higher the probability of the birth of "two of the casket."
3. A large half of the twins are born with a low weight, which can provoke different health problems - such as asthma, for example.
4. Mothers do not always tolerate double births well. In some women, gestational hypertension develops after this.
5. There is a double gene, but it can only affect the birth of twins - fraternal twins. The gene, which would be responsible for the birth of two absolutely identical children - identical twins - does not exist.
6. Methods such as in vitro fertilization, allow the birth of twins with a difference in years. The essence of the method is in the freezing of embryos.
7. Twins can have different fathers. This occurs as a result of heteroterminal superfeculation - a phenomenon in which two ovules of one woman are impregnated by different men.
8. But of course, pairs of twins from different fathers are very rare. Sperm in the female body remain active for several days, while the ovum remains viable for no more than 48 hours. That is, the duration of the fertile period is quite short.
9. In vitro fertilization has certain drawbacks. One Dutch couple, for example, was extremely surprised to learn that one of their baby is white and the other is black. And it happened, in all probability, due to the fact that Mr. Stewart's sperm mistakenly mixed with someone else's material ...
10. Cryptophasia is a special language of twins, which they come up with as a child. No one but him understands him. Very often it consists of a set of illegible sounds and gestures, because an outsider, most likely, will take him for nonsense.
11. Studies have shown that the relationship between twins is established as early as the 14th week of pregnancy.
12. It is believed that the birth of twins can contribute to a special diet. As practice shows, twins are born 5 times more often among "non-Russians". Some doctors believe that the use of dairy products is available for the appearance of twins.
13. The probability of the birth of twins in a woman breastfeeding during conception is 9 times higher than that of the usual future mother.
14. Candida Godoy, Brazil, is the world capital of twins. Couples are born here in 8% of all pregnancies. Scientists tend to believe that a special "twin" gene was brought here by emigrants. And he safely took root, as you can see.
15. In 2010, the Baker High School in Baldvinsville set a record and simultaneously released 12 pairs of twins.
16. Different eating habits and an excellent way of life in the end can lead to the fact that the twins will start to differ greatly from each other externally.
17. The oldest twins in 2010 were the 104-year-old sisters Ana Pugh and Lily Millward from Britain. But the scots Edith Richie and Evelyn Middleton took from them this title. It turned out that the sisters from Scotland are 2 months older than Britons.
18. You could never hear of people like Hunter Johansson, Michael Kutcher or Patricia Bundchen. But you probably know their famous twin relatives - Scarlett, Ashton, Giselle.
19. While the DNA of the twins is almost not different, their fingerprints are not the same.
20. Among twins left-handers are much more common - in 22% of cases.
21. In 15-20% of cases of pregnancies, only one of the two twins survives. This phenomenon is called the disappearing twin syndrome.
22. Most of all twins in the world are born in Nigeria, least of all in China.
23. Mom's twins, according to statistics, live longer.
24. The twin, located in the uterus below, is called "Child A", above - "Child B".
25. Polar bears almost always give birth to twins.