Table 2.

Detection of total hCG, hyperglycosylated hCG and hyperglycosylated hCG free β in pregnancy serum [43,45-48].

Gestation age (weeks since last menses)	N	Total hCG Median (mIU/ml)	Hyperglycosylated hCG (%) mean ± SD	Hyperglycosylated hCG free β (%) mean ± SD
3 weeks (implantation)	n = 5	22	89 ± 24%	12 ± 22%
4 weeks (missing menses)	n = 16	239	49 ± 21%	7.3 ± 5.9%
5 weeks	n = 27	3,683	36 ± 13%	1.7 ± 0.75%
6 weeks	n = 25	16,850	21 ± 14%	1.4 ± 0.63%
7 weeks	n = 22	32,095	16 ± 13%	1.0 ± 0.24%
8 weeks	n = 33	95,282	7.0 ± 5.4%	0.99 ± 0.51%
9 weeks	n = 7	128,300	5.1 ± 4.4%	0.92 ± 0.35%
10 weeks	n = 8	102,750	4.3 ± 3.1%	0.68 ± 0.47%
11 – 13 weeks	n = 21	95,650	2.3 ± 1.5%	0.67 ± 0.33%
14 – 17 weeks	n = 57	32,275	1.3 ± 0.61%	0.62 ± 0.26%
18 – 26 weeks	n = 62	21,250	0.65 ± 0.60%	0.55 ± 0.42%
27 – 40 weeks	n = 49	21,025	0.36 ± 0.16%	0.47 ± 0.19%

Proportion hyperglycosylated hCG and hyperglycosylated hCG free β is the concentrations measured as a proportion of total hCG. SD is standard deviation. Gestational age is 3 day plus and 3 days minus specified week. So that data for 6 weeks pregnancy is 5 weeks 4 days to 6 weeks 3 days.