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

Table 2

Expected minimal increase (%) in β-hCG among normal gestations according to the initial hCG level.

Initial β-hCG (IU/L)	1 day later (%)	2 days later (%)
100	37	84
500	29	64
1000	25	55
1500	23	49
2000	22	46
2500	20	43
3000	19	40
3500	18	38
4000	18	36
4500	17	35
5000	16	33

Note. Values represent the first centile and may be used to reflect the minimal “normal” rise. Adapted from Barnhart et al. [8].