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IVF treatment is an assisted reproductive technology (ART) used to help couples conceive a child. It involves extracting eggs from a woman’s ovaries and fertilizing them with sperm in a laboratory. The fertilized eggs, or embryos, are then transferred back into the woman’s body.
IVF has been used to help couples conceive for more than 30 years. In that time, the success rate has increased from just 5% to 32%. The average success rate of IVF in relation to fertility treatments is about 38%. Yet, each couple’s odds vary depending on a number of factors. This article will discuss the IVF successful rate in world and what causes these variations.
The first successful birth from IVF occurred in 1978. In the early days of IVF, only a small percentage of embryos survived the freezing and thawing process. Now, vitrification is used to prevent this damage. The survival rate after thawing has increased dramatically over the years, with rates close to 90% now being reported.
The percentage of embryos transferred that result in a live birth is called the “clinical pregnancy rate”. The clinical pregnancy rate for fresh, non-donor cycles is about 31%. This percentage drops to 24% for frozen cycles. The reasons for this are many and range from decreased embryo quality to maternal age.
The overall success rates of IVF treatment vary from country to country. This is due, in part, to the different availability of donor eggs and sperm. In Europe, for example, the average success rate is about 38%. Whereas in the United States, the average success rate is 47%.
There are many reasons for this discrepancy. The most important reason may be the use of donor eggs and sperm. For example, in Europe, donors are only allowed to give their gametes anonymously. This makes it difficult for clinics to recruit high-quality egg donors. As a result, European clinics routinely use the same few donors who may not be representative of the population at large.
This leads to decreased success rates because of the decrease in egg quality. All other factors being equal, using fewer low-quality eggs will lower the odds of success. We see this effect in European IVF clinics that use donor sperm; they tend to have high pregnancy rates only among women under 35 years of age.
The average live birth rate per cycle for fresh non-donor IVF is about 31%. For frozen non-donor cycles it is about 24%.The main reason for this difference is due to the differences in donor egg availability. In the United States, donors are more readily available and typically have higher quality eggs. Yet, another reason could be that U.S. clinics tend to transfer one more embryo in each cycle.