IVF Success Rate

Definition - What does IVF Success Rate mean?

An IVF success rate is the percentage chance a woman will become pregnant through in vitro fertilization (IVF). IVF success rate may refer to national averages, clinic averages, or an individual or couple’s specific chances. The score is based on a variety of factors. When used regarding a person or couple, the success rate may be a dominant factor in determining if IVF is an appropriate path to parenthood.

FertilitySmarts explains IVF Success Rate

Generally, IVF success rate is different for every person or couple. The factors typically scored may include any number of the examples listed below. Not all factors are weighted equally, and some, such as cause of infertility or maternal age, can have a more damaging impact then others.

  • Infertility diagnosis and cause
  • Maternal age
  • Ovarian reserve tests
  • Sperm count
  • History of previous pregnancies
  • History of previous miscarriages
  • Each partner’s body mass index (BMI), weight, and overall health
  • Preexisting conditions, diseases, illnesses, or genetic conditions
  • Previous IVF success or failures

However, numerous other factors go into a couple’s actual chances of conception. For an individual or couple considering the treatment, IVF success rates are determined as a preliminary stage of infertility treatment discussions. They may be utilized as a component of family planning, and in discussions with medical professionals regarding the most effective way for an individual or couple to become a parent.

When discussing IVF success rates, there are two types of figures to consider: pregnancy rates and live birth rates. Pregnancy success rates refer to the number of pregnancies that occurred as a result of IVF, while live birth rates refer to the number of babies born as a result of IVF. Any discrepancy between these two numbers is due to miscarriage.


In the United States, average IVF success rates are categorized by maternal age. Recent rates of live births as of 2016 are as follows:

  • Women 35 and younger: 41-43%
  • Women 35-37: 33-36%
  • Women 38-40: 23-27%
  • Women 40 and older: 13-18%
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