Whether there will be it twins?

On each 85 sorts one twins, on 7200 sorts — one тройня, on each 614 000 sorts — one четверня drop out. The birth of five twins all over the world was observed by the little more than hundred times, only in rare instances children from a hand lived to adult age. Last years cases of a birth of six twins by which optimum conditions for "ripening" were created were observed, but only some of them could survive.
Distinguish однояйцовых and двуяйцовых twins. Однояйцовые twins as it is already clear from the name, are formed of one яйцеклетки. Division into two independently developing germinal cages occurs very much early, it is literally in the first days after merge яйцеклетки and сперматозоида. Division can occur also when impregnated яйцеклетка passes through маточные pipes, gets to a uterus and is fixed in it. In the first days after fastening impregnated яйцеклетки in a uterus its division also is possible. Однояйцовые twins possess identical hereditary signs and are always similar, as like as two peas.
Двуяйцовые twins are similar against each other no more, than usual "single" brothers and sisters, and can be and are absolutely not similar. Their origin occurs in following cases: if in both яйцеводах there is one follicle with one яйцеклеткой if in one яйцеводе two follicles and two яйцеклетки if one follicle contains two яйцеклетки are formed.
Близнецовые childbirth is a childbirth of risk. Degree of danger to mother and children is great, therefore such childbirth accepts only in clinic.