To analyze the syndrome of persistent low levels of hCG in terms of its etiology, classification, diagnosis, and management. An analysis of the syndrome of persistent low levels of hCG recorded in CTN in 29 women in the years 1979-2005 by the immunoluminesence method which can quantitatively assess variable levels of hCG in blood and urine.
A comparison was made of our findings with results of a similar studies having been done in England and USA.