[The obstetrical aspects of amniocentesis and chorionic biopsy].

Threatened abortion, a history of operation or tumor-like masses of the uterus and adnexa were seen in 70 women who underwent amniocentesis or chorionic villus sampling for prenatal diagnosis. A control group comprised 40 women with similar obstetric risks who refused to have the invasive studies done. Evidence has been obtained to indicate that, with certain provisions, amniocentesis and chorionic villus sampling may be employed in situations which are regarded as contraindications.