title: Fetal blood sampling in midtrimester pregnancies.
abstract: Sonographically directed placental aspiration has been investigated as a method for obtaining fetal erythrocytes. The technique is generally successful and the fetal red cells are generally usuable for the prenatal diagnosis of the hemoglobinopathies.
mesh_terms: D000649:Amniocentesis; D001800:Blood Specimen Collection / Q000379:methods*; D004912:Erythrocytes / Q000166:cytology; D005260:Female; D005312:Fetal Blood / Q000166:cytology*; D006453:Hemoglobinopathies / Q000175:diagnosis; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis / Q000379:methods*; D013010:Sonication