Success Rates

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Merrion Fertility Clinic

  » Success Rates

Intrepretation of Results

Impact of Blastocyst Transfer

Success Rates.

Since the birth of the first IVF baby, Louise Brown in 1978, there has been a steady improvement in the success rates of IVF treatment. The pregnancy rates vary between IVF clinics, and from time to time within the same clinic. At Merrion Fertility Clinic we regularly monitor our success rates to ensure that they are optimal.

Our current clinical pregnancy* success rates per embryo transfer after IVF & ICSI are as follows:

Female AgeClinical Pregnancy Rate
25 – 3438.9 %
35 – 3734.2 %
38 - 3941.7 %
40 - 4216.7 %


* We use the WHO/ICMART definition of clinical pregnancy: evidence of pregnancy by clinical or ultrasound parameters / ultrasound visualisation of a gestational sac. It includes ectopic pregnancy. Multiple gestational sacs in one patient are counted as one clinical pregnancy.

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