title: [Squalene-cholesterol ratio in the amniotic fluid and gestational age: changes in the threshold in relation to the preparation of the sample].
abstract: The squalene/cholesterol ratio in pellets prepared from amniotic fluid is closely correlated to the gestation age and shows a marked increase in the 39th week of pregnancy. However, the absolute value of the squalene/cholesterol ratio may very considerably in relation to the process used to prepare the sample. The washing of the sedimentary cells seems to be critical point in this procedure; therefore, if it is not correctly standardized, erroneous result may be obtained.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D002784:Cholesterol / Q000032:analysis*; D005260:Female; D005865:Gestational Age; D006801:Humans; D008722:Methods; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D013185:Squalene / Q000032:analysis*
chemical_list: D013185:Squalene; D002784:Cholesterol
vernacular_title: Rapporto squalene/colesterolo nel liquido amniotico ed epoca gestazionale: variazione della soglia in relazione alla preparazione del campione.