Hello the Doctor! Tell or say, please, how much precisely it is possible to define or determine...

[The anonym]

Hello the Doctor! Tell or say, please, how much precisely it is possible to define or determine risk of a syndrome of the Down at a fetus. Pregnancy of 13 weeks. Olga Ivanovna

[Masha]

In 15 weeks the analysis of a blood which gives 40 % of reliability on a status of your child is done or made. If some parameters will be beyond norm or rate, and also on series of other factors (a heredity, etc.), the doctor can suggest to make more exact analysis (amniotic waters). But the risk of an abortion, therefore this analysis raises or increases do or make, if really there are many chances that at the child any mental disease.