β-Human Chorionic Gonadotropin Dynamics in Early Gestational Events: A Practical and Updated Reappraisal

Table 1

Expected minimal increase (%) in β-hCG among normal gestations.

Author, year (References)	n	Confidence interval (%)	1 day (%)	2 days (%)
Kadar, 1981 [7]	20	85	29%	66
Barnhart, 2004 [8]	287	99	24%	53
Seeber, 2006 [9]	1249	99.9	NA	35

Not available.