Tell or Say please, whether the truth, that after 20 weeks it is impossible to lay on a back and...

[Dasha]

Tell or Say please, whether the truth, what after 20 weeks it is impossible to lay on a back and why?

[Ryazanov And.]

Already after 16 weeks of the pregnant woman it is better to not sleep on a back. In such position an increasing or enlarged uterus presses on an internal vena cava and an aorta which go down on a back wall of a stomach or belly. It can lower inflow of a blood to the child and to some parts of your body, for example, in many cases of a cramp of legs or foots happen then when the woman sleeps on a back.