Colorado Center for Reproductive Medicine Statistics
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|
2001 Statistics
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|
Type of Cycle
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Age of Woman
|
| Fresh Embryos from Nondonor Eggs |
<35
|
35-37
|
38-40
|
41-42
|
>42
|
|
Number of cycles
|
221
|
121
|
107
|
48
|
26
|
|
Percentage of cycles resulting in pregnancies c
|
66.1
|
64.5
|
41.1
|
45.8
|
23.1
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|
Percentage of cycles resulting in live births b,c
|
58.4
|
52.9
|
31.8
|
20.8
|
19.2
|
|
Percentage of retrievals resulting in live births b,c
|
60.3
|
53.8
|
35.4
|
24.4
|
20.8
|
|
Percentage of transfers resulting in live births b,c
|
60.6
|
54.2
|
36.2
|
24.4
|
20.8
|
|
Percentage of cancellations
|
3.2
|
1.7
|
10.3
|
14.6
|
7.7
|
|
Average number of embryos transferred
|
3.2
|
3.4
|
4.1
|
4.5
|
4.9
|
|
Percentages of pregnancies with twins
|
39.7
|
43.6
|
25
|
18.2
|
0/6
|
|
Percentage of pregnancies with triplets
|
15.8
|
11.5
|
20.5
|
4.5
|
1/6
|
|
Percentage of live births having multiple infants b,c
|
54.3
|
45.3
|
35.3
|
2/10
|
1/5
|
|
Frozen Embryos from Nondonor Eggs
|
| Number of transfers |
41
|
26
|
14
|
4
|
2
|
|
Percentage of Transfers resulting in live births b,c
|
51.2
|
38.5
|
6/14
|
0/4
|
2/2
|
|
Average number of embryos transferred
|
3.2
|
2.8
|
3.9
|
2.8
|
3.0
|
|
All Ages Combined
|
| Donor Eggs |
Fresh Embryos
|
Thawed Embryos
|
|
Number of Transfers
|
197
|
56
|
|
Percentage of Transfers resulting in live births b,c
|
70.6
|
33.9
|
|
Average number of embryos transferred
|
2.9
|
3.6
|
a) Reflects patient and treatment characteristics of ART cycles performed in 2001 using fresh, nondonor eggs or embryos
b) Pregnancies resulting in one or more children born alive (i.e., a multiple-infant birth is counted as one live birth).
c) When fewer than 20 cycles using fresh, non-donor eggs or embryos are reported in any one category, live birth rates are shown as fractions, and reliability ranges are not given. Calculation of percentage based on a fraction may be misleading and is not encouraged.
d) All ages (including age >42) are reported together because previous data show that patient age does not materially affect success with donor eggs.
e) For patients older than 42 undergoing ART cycles using fresh, non-donor eggs or embryos, clinic-specific outcome rates are unreliable. Patients are urged to review national outcomes for these age groups.
The above information was submitted to SART (Society for Reproductive Technology) on December 13, 2002 for inclusion in its national report on 2001 IVF statistics. This information will be published by SART and posted on the CDC website in late 2003.
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