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Our Success Rates

The meticulous work of our embryologists, in combination with the expertise of our medical staff, enables us to consistently achieve high success rates with a low multiple birth rate.

Many factors can contribute to an infertility program's success rates: the treatment approaches of each program; the age of the patient; and the cause of their infertility. Success rates naturally decline as women get older, and drop significantly after age 37.

A comparison of various clinics' success rates may not be meaningful because patients' medical characteristics, treatment approaches, and entrance criteria for ART (assisted reproductive technology) may vary from clinic to clinic.

View our 2009 data as reported to the Society for Assisted Reproductive Technology (SART).

2010 Dartmouth-Hitchcock IVF success rates

* All multiples are twins

Fresh, autologous (from the patient)

Patient's age Under 35 35-37 38-40 Over 40
Number of cycles 61 40 40 15
Number of retrievals 55 36 35 9
Cancellation rate 9.8% 10.0% 12.5% 40.0%
Pregnancies verified by early ultrasound 29 (47.5%) 15 (37.5%) 12 (30%) 1 (6.7%)
Multiple pregnancy rate* 27.5% 33.3% 16.6% 1/1
Implantation rate 43% 30.3% 16.9% 8.3%
Mean number transferred 1.8 1.9 2.6 3.0

 

Fresh, donor

All ages
Number of cycles 5
Number of retrievals 5
Cancellation rate 0%
Pregnancies verified by early ultrasound 3 (60%)
Multiple pregnancy rate* 33.3%
Implantation rate 44.4%
Mean number transferred 1.8

 

Frozen, autologous (from the patient)

Patient's age Under 35 35-37 38-40 Over 40
Number of cycles 18 2 6 2
Pregnancies verified by early ultrasound 8 (44.4%) 1 (50%) 2 (33.3%) 0%
Multiple pregnancy rate* 12.5% 0% 0%
Implantation rate 28.1% 25.0% 14.3%
Mean number transferred 1.8 2.0 2.3 1.5

 

Frozen, donor

All ages
Number of cycles 7
Pregnancies verified by early ultrasound 1 (14.3%)
Multiple pregnancy rate* 0%
Implantation rate 10%
Mean number transferred 1.4

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