IVF
70%Positive pregnancy
60%Live birth
Average female age35
REAL CLINICAL DATA · FROM PATIENT RECORDS
Cumulative Success and Live Birth Rates
We explain the difference between first-transfer and cumulative success while keeping positive pregnancy and live birth as separate metrics.
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We do not evaluate success from the first attempt alone.
Cumulative outcomes aim to provide a broader view of the overall clinical outcome across the treatment journey.
Main outcome
REAL CLINICAL DATA
Our Cumulative Success Rates
We present positive pregnancy and live birth outcomes separately.
Donor Group
Cumulative positive pregnancy
90.7%
IVF Group
Cumulative positive pregnancy
89.7%
Donor Group
Cumulative live birth
73%
IVF Group
Cumulative live birth
68%
From first attempt to overall outcome
First Attempt and Cumulative Outcome
We compare the first embryo transfer outcome with cumulative positive pregnancy after a maximum of three transfers.
Donor Group
Positive pregnancy
77%First transfer
→
Cumulative
After a maximum of 3 ETs
90.7%Cumulative
+13.7 points
IVF Group
Positive pregnancy
72.7%First transfer
→
Cumulative
After a maximum of 3 ETs
89.7%Cumulative
+17.0 points
Two different clinical outcomes
Positive Pregnancy and Live Birth
Achieving a positive pregnancy and a pregnancy resulting in a live birth are not the same outcome.
Donor Group
90.7%
Cumulative positive pregnancy
Cumulative live birth: 73%
IVF Group
89.7%
Cumulative positive pregnancy
Cumulative live birth: 68%
By treatment
Cumulative Outcomes by Treatment
Egg Donation
91%Positive pregnancy
80%Live birth
Average female age42
Sperm Donation
93%Positive pregnancy
76%Live birth
Average female age30
Embryo Donation
92%Positive pregnancy
82%Live birth
Average female age42
Special clinical data
Oocyte and Embryo Donation Age 45+
● Average female age: 48
72.5%Positive pregnancy on first attempt
84.5%Cumulative positive pregnancy
64%Cumulative live birth
Read the data correctly
What Does Cumulative Success Mean?
01First transfer
The outcome of the first embryo transfer.
02Subsequent transfers
Subsequent embryos available during the treatment journey may be included in the assessment.
03Cumulative outcome
The overall clinical outcome reached at the end of the defined transfer process.
04Live birth
A separate and later clinical outcome metric than positive pregnancy.
Frequently asked questions
Questions about cumulative success and live birth
Cumulative success considers not only the first embryo transfer, but also the outcomes of subsequent transfers within the defined treatment journey. In this dataset, cumulative positive pregnancy is assessed after a maximum of 3 ETs.
The first transfer reflects only the outcome of the first embryo transfer. A cumulative rate may include subsequent transfers during the treatment journey and can therefore show a higher overall outcome.
In the Donor group, first-transfer positive pregnancy is 77%, while cumulative positive pregnancy after a maximum of 3 ETs is 90.7%.
In the IVF group, first-transfer positive pregnancy is 72.7%, while cumulative positive pregnancy after a maximum of 3 ETs is 89.7%.
Positive pregnancy is an earlier outcome showing that pregnancy has been established. Live birth is a later endpoint in the pregnancy journey. Pregnancy losses and other biological or clinical factors can therefore result in a lower live birth rate.
In the Ventus IVF data presentation, the cumulative live birth rate is 73% for the Donor group and 68% for the IVF group.
The source dataset defines the cumulative outcome after a maximum of 3 ETs; fresh and frozen transfer breakdowns are not shown separately in this public dataset. Therefore, no separate sub-rate is generated on the website.
Public pages present clinical outcomes as percentages. The record volumes underlying the calculations are maintained in the internal dataset; sample size is taken into account in age-based statistical balancing.
No. A cumulative clinical rate summarises the historical outcomes of a patient group. An individual treatment outcome can vary according to the patient's biological and clinical characteristics.
Success data centre