title: Early prenatal diagnosis; a study of biopsy techniques and cell culturing from extraembryonic membranes.
mesh_terms: D001706:Biopsy / Q000009:adverse effects / Q000295:instrumentation; D002478:Cells, Cultured; D002869:Chromosome Aberrations / Q000235:genetics; D025063:Chromosome Disorders; D005321:Extraembryonic Membranes / Q000166:cytology* / Q000473:pathology; D005260:Female; D005865:Gestational Age; D006801:Humans; D007621:Karyotyping; D008297:Male; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods*; D012732:Sex Determination Analysis