title: Early amniocentesis.
authors.affiliation: Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115.
authors.forename: C A
authors.initials: CA
authors.lastname: Penso
authors.forename: F D
authors.initials: FD
authors.lastname: Frigoletto
mesh_terms: D000649:Amniocentesis / Q000009:adverse effects / Q000379:methods; D005260:Female; D006801:Humans; D011237:Predictive Value of Tests; D011247:Pregnancy