has subject area Biopsy (MeSH) Chorion (MeSH) Clinical Trials as Topic (MeSH) Evaluation Studies as Topic (MeSH) Female (MeSH) Humans (MeSH) Pregnancy (MeSH) Prenatal Diagnosis (MeSH)
keywords Biopsy Chorion Clinical Trials as Topic Evaluation Studies as Topic Female Humans Pregnancy Prenatal Diagnosis