title: Circulating levels of pregnancy specific beta 1 glycoprotein in late pregnancy: nyctohemeral and day-to-day variation, and variation during labour.
abstract: Circulating levels of pregnancy-specific beta 1 glycoprotein have been determined in a number of physiological situations in late pregnancy. The apparent variation in five subjects studied over a 24-hour period was not in excess of that due to the assay. Excess variation was apparent in 2 of 11 subjects studied daily for up to 8 days, and in 6 of 16 patients studied serially during labour.
mesh_terms: D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D007751:Labor, Induced; D007743:Labor, Obstetric; D011247:Pregnancy; D011257:Pregnancy Proteins / Q000032:analysis*; D011263:Pregnancy Trimester, Third; D011268:Pregnancy-Specific beta 1-Glycoproteins / Q000032:analysis*
chemical_list: D011257:Pregnancy Proteins; D011268:Pregnancy-Specific beta 1-Glycoproteins