Beta HCG is the indicator to detect pregnancy - normal or ectopic.

However, this type of protein also an indicator to detect any abnormal growth of cells in the body, i.e. metastasize type of cells.

For normal non-pregnant women, the level of the beta-hcg should not approaching 2 u/l.
In my case:
21 November 2008 (detected molar pregnancy) = 779 539 u/l
21 November 2008 (after d&c) = 573 108 u/l
1 Disember 2008 (after 2nd d&c) = 5401 u/l
5 Disember 2008 = 2793 u/l
12 Disember 2008 = 7697 u/l (red alert: it increased)
19 Disember 2008 = 14 428 u/l (beeping red alert: it increased and doubling within a week!)