title: Risk of fetal loss in twin pregnancies undergoing second trimester amniocentesis.
authors.forename: L H
authors.initials: LH
authors.lastname: Nelson
mesh_terms: D000649:Amniocentesis; D005260:Female; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011272:Pregnancy, Multiple; D014427:Twins