IVF Success Rates

What do the numbers mean?

We calculate IVF statistics in several ways. Each statistic provides a different insight into treatment outcomes and expectations.

We believe that providing the most accurate assessment of the outcome of IVF, including good and bad outcomes help people make good choices. The more accurately we can predict the outcome of IVF treatment, the better and more informed the decision making process.

Statistics using Started Cycles are helpful for patients before they begin a cycle because these statistics include everyone who gets cancelled or does not have a transfer. Thus, these statistics reflect the outcome of everyone who starts treatment, which some argue are the most helpful to patients because they include everyone who starts and not just the patients with a high probability of success.

2013 – 2014 IVF Outcomes•

newest data available

Combined Prognosis<35 35-37 38-40 41-42 Totals Donor Egg
Number of Cycles10152362020923
Ongoing Pregnancy/Start160%61/10148%25/5257%17/3625%5/2052%52%12/23
Ongoing Pregnancy/ET266%61/9357%25/4457%17/3028%5/1857%52%12/23
Implantation Rate350%38%28%13%36%56%
Elective Single Embryo Transfer452%34%7%6%37%52%
Average Number Transferred1.51.82.22.91.81.5
Multiple Gestation19%10%21%0%16%25%
Frozen Embryo Transfers<35 35-37 38-40 41-42 Totals Donor Egg
Number of Cycles28101225211
Ongoing Pregnancy/Start52%14/2750%5/1064%7/1150%1/254%40%4/10
Ongoing Pregnancy/ET52%14/2750%5/1064%7/1150%1/254%40%4/10
Implantation Rate50%62%65%33%55%67%
Elective Single Embryo Transfer56%40%45%50%50%67%
Average Number Transferred1.21.31.51.51.31.0
Multiple Gestation0%33%50%0%24%17%

What do the numbers mean?

We calculate IVF statistics in several ways. Each statistic provides a different insight into treatment outcomes and expectations.

We believe that providing the most accurate assessment of the outcome of IVF, including good and bad outcomes help people make good choices. The more accurately we can predict the outcome of IVF treatment, the better and more informed the decision making process.

* These cycles exclude any “batched” cycles. Batched cycles indicated that we combine the embryos from two (almost always) or more cycles to culture and transfer. Future printouts will show all cycles. This representation is still important for the majority of cycles which do not include “batching”.

Statistics using Started Cycles are helpful for patients before they begin a cycle because these statistics include everyone who gets cancelled or does not have a transfer. Thus, these statistics reflect the outcome of everyone who starts treatment, which some argue are the most helpful to patients because they include everyone who starts and not just the patients with a high probability of success.

1 Positive Pregnancy Test per Cycle Start: The percentage of started cycles with an ultrasound-proven embryonic heart rate that did not miscarry. This percentage should be very close to the delivery rate that we report to SART and the CDC.

Statistics using only Cycles with an Embryo Transfer inform patients who expect a good prognosis for IVF embryo transfer.

2 Ongoing Pregnancy/Transfer: The percentage of embryo transfers with an ultrasound-proven embryonic heart rate that did not miscarry. This percentage should be very close to the delivery rate that we report to SART and the CDC.

3 Implantation Rate: The percentage of embryos transferred that resulted in an ongoing pregnancy. We calculate this number by dividing the number of ongoing pregnancies by the number of embryos transferred. The implantation rate is a very good way to determine the embryo quality from the IVF lab.

4 Elective Single Embryo Transfer: The percentage of patients who chose to transfer a single embryo when they had multiple embryos available for transfer. We use this statistic to gauge how aggressively the clinic tries to avoid multiple gestations. Clinics with high implantation rates can perform more eSET and maintain a high pregnancy and delivery rate.

DEFINITIONS

*Statistics using only Cycles with an Embryo Transfer inform patients who expect a good prognosis for IVF embryo transfer.

P – Positive Pregnancy Test per Cycle Start: The percentage of started IVF cycles with a positive pregnancy test.

O – Ongoing Pregnancies.

I – Implantation Rate.

Q – Sustained Clinical Pregnancy/Transfer The percentage of embryo transfers with an ultrasound-proven embryonic heart rate that did not miscarry. This percentage should be very close to the delivery rate that we report to SART and the CDC.

W – Implantation Rate: The percentage of embryos transferred that resulted in an ongoing pregnancy. We calculate this number by dividing the number of ongoing pregnancies by the number of embryos transferred. The implantation rate is a very good way to determine the embryo quality from the IVF lab.

E – Elective Single Embryo Transfer: The percentage of patients who chose to transfer a single embryo when they had multiple embryos available for transfer. We use this statistic to gauge how aggressively the clinic tries to avoid multiple gestations. Clinics with high implantation rates can perform more eSET and maintain a high pregnancy and delivery rate.

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