In a healthy pregnancy your HCG levels should double every 48 hours. But when the pregnancy is not progressing the way it should as in the case of chromosomal abnormality your HCG may rise at slower rates or rise at first and then start to decline.
Definition of moot. 1 : a deliberative assembly primarily for the administration of justice; especially : one held by the freemen of an Anglo-Saxon community.
moot 1154, from O.E. gemot meeting (especially of freemen, to discuss community affairs or mete justice), from P.Gmc. *ga-motan (cf. Old Low Frankish muot encounter, M.Du. moet, M.H.G. muoz), from collective prefix *ga- + *motan (see meet (v.)).