Colorado Center for Reproductive Medicine
2004 Statistics
|
Type of Cycle |
Age of Woman |
|
Fresh Embryos from Non-donor Eggs |
<35 |
35-37 |
38-40 |
41-42 |
>42 |
|
Number of cycles |
284 |
191 |
136 |
68 |
31 |
|
Percentage of cycles resulting in pregnancies c |
64.1 |
62.8 |
50.7 |
42.6 |
22.6 |
|
Percentage of cycles resulting in live births b,c |
58.5 |
56.0 |
41.9 |
29.4 |
6.5 |
|
(Reliability Range) |
(52.7-64.2) |
(49.0-63.1) |
(33.6-50.2) |
(18.6-40.2) |
(0-15.1) |
|
Percentage of retrievals resulting in live births b,c |
60.4 |
57.8 |
43.2 |
32.3 |
6.9 |
|
Percentage of transfers resulting in live births b,c |
63.4 |
59.4 |
44.5 |
33.3 |
7.7 |
|
Percentage of cycles with elective single embryo transfer |
2.3 |
0.6 |
0.8 |
0 |
0 |
|
Percentage of cancellations c |
3.2 |
3.1 |
2.9 |
8.8 |
6.5 |
|
Implantation rate |
47.0 |
38.7 |
26.6 |
19.9 |
6.1 |
|
Average number of embryos transferred |
2.3 |
2.5 |
2.9 |
2.9 |
3.8 |
|
Percentages of live births with twins c |
47.3 |
34.2 |
26.1 |
27.6 |
1/7 |
|
Percentage of live births with triplets or more c |
5.5 |
5.8 |
10.1 |
0 |
0/7 |
Frozen Embryos from Non-donor Eggs
| |
Age of Woman |
|
<35 |
35-37 |
38-40 |
41-42 |
>42
|
|
Number of transfers |
57 |
35 |
26 |
12 |
3 |
|
Percentage of cycles resulting in live births b,c |
43.9 |
37.1 |
42.3 |
3/12 |
0/3
|
|
Average number of embryos transferred |
2.4 |
2.3 |
2.2 |
2.2 |
2.3 |
Donor Eggs
| |
All Ages Combinede |
|
Fresh Embryos |
Frozen Embryos |
|
Number of transfers |
203 |
49 |
|
Percentage of cycles resulting in live births b,c |
80.8 |
40.8 |
|
Average number of embryos transferred |
2.2 |
2.4 |
a) Reflects patient and treatment characteristics of ART cycles performed in 2004 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) in January 2006 and has been included in its 2004 national report as well as the Centers for Disease Control and Prevention (CDC) 2004 ART statistics.
Research cycles are included in SART data, not in CDC data, thus
you will notice a difference in the SART and CDC data reports.
Reporting Success Rates
Through our continuous refinements
in clinical and laboratory techniques, and with the application of
scientific advancements, the Colorado Center for Reproductive Medicine
continually achieves high pregnancy rates resulting in a live-born
infant. A comparison of clinic success rates may not be meaningful
because patient medical characteristics and treatment approaches may
vary from clinic to clinic.
ART clinics in the U.S. are required by law to report outcomes to the Centers for Disease Control and Prevention (CDC). Most U.S. fertility programs follow the guidelines of the Society for Assisted Reproductive Technology (SART) in reporting success rates. Each year, SART and the CDC collect,
compile, and publish clinic-specific data. Results are organized by
state and procedure. The data also includes information on pregnancy
outcomes, such as the rate of miscarriage, twins, and other multiple
births.