Table 2.

Overall minimal increase in hCG concentration from initial presentation

Initial hCG	1 day later	2 days later	7 days later
100	1.37	1.84	6.43
500	1.29	1.64	4.28
1000	1.25	1.55	3.53
1500	1.23	1.49	3.12
2000	1.22	1.46	2.86
2500	1.20	1.43	2.66
3000	1.19	1.40	2.50
3500	1.18	1.38	2.38
4000	1.18	1.36	2.27
4500	1.17	1.35	2.17
5000	1.16	1.33	2.09

Data represent the predicted increase (multiples of initial value) at the 1^st percentile for women with an ongoing intrauterine pregnancy.