title: Third trimester amniocentesis using a short needle: an assessment of its safety and value in cases of doubtful dates.
mesh_terms: D000649:Amniocentesis / Q000379:methods*; D005260:Female; D005865:Gestational Age; D006801:Humans; D009339:Needles; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D012449:Safety