The dear doctor! The grandmother of my husband from the father some times gave birth or travailled d...

[Albina]

The dear doctor! The grandmother of my husband from the father some times gave birth or travailled to twins, my aunt (mamina the little sister) too. What probability of a birth of two at a birth at me.
In advance thanks

[Talanova E.J.]

Dear Albina!
It is considered, that if twins in a family tree dizigotnye ("unequal") predisposition to this attribute is inherited, and probability of a birth of two at a birth from you above, than on the average on a population, but not above 25 %. In occasion of monozygotic ("identical") twins of opinion miss. The standard point of view, that random factors in case of monozygotic twins prevail. However, there are data about families where in a family tree monozygotic twins meet some times. It can speak that any unknown while factors, c division of the impregnated zygote in appropriate way.