Schlagwörter
Abortion
4
Adult
4
Aneuploidy
4
Belgium
4
Bulgaria
4
Chorionic Villi Sampling
4
Female
4
First
4
Gestational Age
4
Humans
4
Incidence
4
Odds Ratio
4
Pregnancy
4
Pregnancy Trimester
4
Prenatal
4
Propensity Score
4
Retrospective Studies
4
Risk Assessment
4
Risk Factors
4
Spain
4
Spontaneous
4
Ultrasonography
4
adverse pregnancy outcome
4
chorionic villus sampling
4
first-trimester screening
4
invasive procedures
4
invasive testing
4
miscarriage
4
pregnancy complications
4
prenatal diagnosis
4