Bruk av amniocenteser og chorionbiopsier i Norge

Amniocentesis or chorionic villus sampling are performed in about 2% of all pregnancies in Norway which is far less than in the other Nordic countries. Most of the amniocenteses are performed due to advanced maternal age. In Norway this is defined as maternal age ≥ 38 years at term. Couples with known chromosomal aberrations or genetic diseases in their families, i.e. women at a high risk of having an affected fetus, are offered chorionic villus sampling. Earlier studies on complications and pregnancy outcome following amniocentesis or chorionic villus sampling have been performed in other countries mainly on women at a lower risk (≥ 35 years) than for the women having such tests in Norway. We do not have data on pregnancy outcome and possible complications following amniocentesis and chorionic villus sampling in a Norwegian population.