Table 2.

Concentration of total hCG and hyperglycosylated hCG (hCG-H) in 496 serum samples from 310 women with term pregnancies measured using the Siemens Immulite 1000 total hCG assay.

Gestation age (weeks since start of menstrual period)	N	Median Total hCG ng/ml	Range Total hCG ng/ml (variation)	Median HCG-H ng/ml	Range hCG-H ng/ml (variation)	hCG-H %
3-weeks-3-weeks 6-days	n = 42	0.26 (16 of 42 <0.1 ng/ml)	0.04 - 5.5	0.20 (16 of 42 <0.1 ng/ml)	0.01 - 6.45	87%
4 weeks-4 weeks 6-days	n = 42	3.4	0.21 - 173 (824X)	2.5	0.18 - 160 (888X)	51%
5 weeks-5-weeks 6-days	n = 67	65	1.86 - 1308 (704X)	8.6	0.96 - 698 (731X)	43%
6-weeks-6-weeks 6-days	n = 29	252	3.80 - 855 (225X)	86	0.76 - 629 (827X)	36%
7 weeks-7 weeks 6-days	n = 30	3,278	203 - 7,766 (38X)	359	27 - 931 (34X)	16%
8 weeks-8 weeks 6-days	n = 33	4,331	1,064 - 10,057 (9.4X)	386	67 - 1050 (15.6X)	7.0%
9 weeks-9 weeks 6-days	n = 24	5,832	1,031 - 11,586 (11.2X)	430	102 - 1158 (11.3X)	5.1%
10 weeks-10 weeks 6-days	n = 20	10,352	1,952 - 19,958 (10.2X)	521	188 - 1855 (9.9X)	4.3%
11 weeks-13-weeks 6-days	n = 41	5,953	1,440 - 15,318 (10.6X)	137	24 - 330 (13.7X)	2.3%
14 weeks-17 weeks 6-days	n = 57	2,934	311 - 4,757 (15.2X)	26	6.7 - 129 (19.3X)	1.3%
18 weeks-26-weeks 6-days	n = 62	1,931	210 - 6,223 (30.3X)	15.8	5.3 - 95 (17.9X)	0.65%
27 weeks-40 weeks 6-days	n = 49	1,911	184 - 8,530 (46.4X)	2.95	0.3 - 12.2 (40.6X)	0.14%

Data from 50 pregnancies that failed due to miscarriage were excluded from this table. Pregnancies which failed to implant in early pregnancy (total hCG <0.1 ng/ml) are indicated in parenthesis.