title: Fetal blood drawing.
abstract: A small sample of fetal blood suitable for studies of haemoglobin synthesis was obtained from a placental vessel under endoscopic visualisation in 23 of 26 patients in whom the procedure was attempted prior to second-trimester abortion. Fetal blood loss, calculated in 23 cases, was between 0-2 ml. and 2-5 ml., and fetal blood-volume depletion varied from 0-5% to 15%. No short-term ill-effects were demonstrated in mother or fetus in any of 16 patients in whom the injection of aborti-facient was postponed for between 16 and 24 hours after the procedure.
mesh_terms: D000032:Abortion, Therapeutic; D000650:Amnion; D000653:Amniotic Fluid / Q000032:analysis; D001800:Blood Specimen Collection; D001811:Blood Volume Determination; D002404:Catheterization / Q000295:instrumentation; D004724:Endoscopy; D004906:Erythrocyte Count; D005260:Female; D005312:Fetal Blood; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D008722:Methods; D010920:Placenta / Q000098:blood supply; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D014463:Ultrasonography
chemical_list: D006454:Hemoglobins