The spanish fertility society is an organization that promotes and fosters fertility studies and is the organization to which VITA reproductive medicine belongs. This organization periodically publishes analysis stadistics about assisted reproduction treatments in which 141 spanish centers take part. A lot of interesting data about the success rates of the assisted reproduction techniques can be found in these studies.

In this article we are going to value the IVF success rates. These reproduction treatments consist of extracting oocytes by follicular puncture to then be fertilized in the laboratory by conventional IVF (when the oocytes are put in contact with the sperm in the laboratory) or through an (Intracytoplasmic sperm injection, where the insemination is carried out by a specialist directly using a microneedle), with the end result to be having enough quality embryos to then transfer them to the womb.

In IVF it is possible to use the patients own oocytes or to use those of an anonymous donor. These oocytes, both the patients or the donors, can be oocytes that have been previously frozen, for the motives of being able to delay maternity for personal reasons, work or family, with a maximum guarantee.

As we can see from these success rates, IVF is a treatment recommended to women who suffer with fertility problems (ovary problems, obstruction of the fallopian tubes, endometriosis), especially in women over 35 years of age, in which the probability of a natural pregnancy is very low. IVF with donated oocytes, of which the selection has been very well studied, can increase considerably the success rates of achieving pregnancy. The use of cryopreserved oocytes is an interesting option for those women that wish to delay maternity.

IVF Success Rates using the patients own oocytes

Rate of embryo transfer through puncture 82,4%
Rate of pregnancy though an embryo transfer 37,9%
Rate of births through embryo transfer 22,2%
Rate of oocytes inseminated to oocytes obtained 76%
Rate of fertilization 67,2%
Rate of miscarriages 21,4%
Rate of ectopic pregnancies 2,6%
Rate of single pregnancies 76,1%
Age Under 35 Between 35-39 Over 40
Rate of pregnancy by cycle 20,9% 15,6% 6,6%
Rate of pregnancy through transfer 43,5% 36% 24,6%

IVF Success Rates using the patients own oocytes previously frozen

Rate of embryo transfer each cycle of embryo thawing 91,5%
Rate of pregnancy by embryo transfer 31,7%
Rate of births by embryo transfer 17,9%
Rate of miscarriages 27,7%
Rate of ectopic pregnancies 1,5%
Rate of single pregnancies 80%
Age Under 35 Between 35-39 Over 40
Rate of pregnancy by thawing 33,8% 28,7% 22,2%
Rate of pregnancy by transfer 36,3% 31,2% 25,3%

IVF Success Rates through ovary donation

Rate of embryo transfer by each cycle of oocytes reception 92,6%
Rate of pregnancy though an embryo transfer 53,4%
Rate of births through embryo transfer 31,7%
Rate of oocytes inseminated to oocytes obtained 80,9%
Rate of fertilization 73,6%
Rate of miscarriages 22,1%
Rate of ectopic pregnancies 0,9%
Rate of single pregnancies 68,9%
Age Under 35 Between 35-39 Over 40
Rate of pregnancy by thawing 47,9% 50,7% 49,2%
Rate of pregnancy by transfer 52,5% 54,6% 53,1%

IVF Success Rates using donated oocytes previously frozen

Rate of embryo transfer each cycle of embryo thawing 95,4%
Rate of pregnancy by embryo transfer 39,3%
Rate of births by embryo transfer 22,5%
Rate of miscarriages 27,2%
Rate of ectopic pregnancies 0,9%
Rate of single pregnancies 80%
Age Under 35 Between 35-39 Over 40
Rate of pregnancy by thawing 37% 38% 37,5%
Rate of pregnancy by transfer 38,8% 39,8% 39,3%