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HCG
LEVELS IN PREGNANCY
hCG (human chorionic gonadotropin) is a
hormone produced by the placenta during pregnancy. Home pregnancy tests (HPTs)
and Blood serum tests are designed to detect it. hCG is detectable in the
blood of pregnant women by 8-10 days after ovulation and the majority by
12 days past ovulation. This is when the embryo burrows itself into the
lining of the uterus. This is also know as implantation. HCG rises
progressively from conception. Levels double on the average, every 31-48
hours as the embryo grows until values reach 6500 mIU/ml (6,500 IU/L) at
approximately the eighth week after the last menstrual period (LMP). After
that the rate of rise becomes individualized, peaking between the 60th and
70th day (9 to 10 weeks) LMP (Last Menstrual Period). HCG decreases
slightly between the 12th and 16th week post LMP, and then remains
constant until birth.
|
HCG
Levels during Pregnancy
|
|
Days
Past Ovulation |
Normal
HCG Levels:
MIU/ML
|
|
7
Days
|
5-50
(avg. 14)
|
|
14
Days
|
5-50
(avg. 21)
|
|
21
Days
|
5-50
(avg. 42)
|
|
28
Days
|
10-425
|
|
35
Days
|
19-7,340
|
|
42
Days
|
1,080-56,500
|
|
7-8
weeks
|
7,650-229,000
|
|
9-12
weeks
|
25,700-288,000
|
|
13-16
weeks
|
13,300-254,000
|
|
17-24
weeks
|
4,060-165,400
|
|
25-40
weeks
|
3,640-117,000
|
Source: http://www.advancedfertility.com/earlypre.htm
NORMAL SINGLE PREGNANCIES
|
Day
after HCG or LH
|
Average
mIU/ml
|
High
mIU/ml
|
Low
mIU/ml
|
#
|
|
14
|
48
|
119
|
17
|
12
|
|
15
|
59
|
147
|
17
|
18
|
|
16
|
95
|
223
|
33
|
23
|
|
17
|
132
|
429
|
17
|
21
|
|
18
|
292
|
758
|
70
|
19
|
|
19
|
303
|
514
|
111
|
23
|
|
20
|
522
|
1690
|
135
|
13
|
|
21
|
1061
|
4130
|
324
|
12
|
|
22
|
1287
|
3279
|
185
|
22
|
|
23
|
2034
|
4660
|
506
|
13
|
|
24
|
2637
|
10000
|
540
|
16
|
NORMAL TWIN PREGNANCIES
|
Day
after LH or HCG
|
Average
mIU/ml
|
High
mIU/ml
|
Low
mIU/ml
|
#
|
|
14
|
68
|
313
|
56
|
7
|
|
15
|
38
|
159
|
26
|
9
|
|
16
|
146
|
803
|
112
|
12
|
|
17
|
154
|
542
|
52
|
8
|
|
18
|
360
|
1760
|
200
|
9
|
|
19
|
499
|
2509
|
215
|
13
|
|
21
|
963
|
5859
|
631
|
10
|
|
