Sarah-Jayne Ambler

We label all pregnancies ‘high risk’ and ‘low risk’. When women are screened for foetal abnormalities, results are most often reported as a statistical chance and sometimes the terms ‘increased chance’ or ‘low chance’ are used. All hospitals have a number they use as a cut-off between those results that are ‘increased chance’ (further testing is offered) and ‘low chance’ (no further testing). This number is usually 1 in 150. This means that all women who have a result between 1 in 2 and 1 in 150 will be offered a diagnostic test such as CVS or amniocentesis.