Brambati, B Transabdominal versus transcervical chorionic villus sampling: a randomized trial. [electronic resource] - Human reproduction (Oxford, England) Aug 1988 - 811-3 p. digital Publication Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial ISSN: 0268-1161 Standard No.: 10.1093/oxfordjournals.humrep.a136788 doi Subjects--Topical Terms: AbdomenCervix UteriChorionic Villi--cytologyChorionic Villi Sampling--methodsClinical Trials as TopicFemaleHumansPregnancyRandom AllocationUltrasonography