Your chances of success of being pregnant after IVF-ICSI

Your chances of success of being pregnant after IVF/ICSI treatment depend on different factors. The most important conclusion from practical experience is that your individual chances of success are very difficult to predict beforehand. The doctors of the CRG will always try to make the most accurate assessment possible.
We can therefore generally say that IVF is certainly worth trying for a lot of couples, although it will not always result in the birth of a child.
Success cannot be guaranteed.


Individual factors

Under reduced fertility we discuss the different factors which may affect a person or couple's chances of becoming pregnant.

In IVF/ICSI treatment the following aspects have the biggest effect on your chances of success.

Your age (woman)

The older you are, the less easy it is to get pregnant and the higher the risk of miscarriage.

Your treatment history

The number of previous IVF/ICSI treatments is an indication. For instance, if you have already had four failed attempts, a possible fifth treatment will not offer the same chances of success as the first.

Your medical profile

Your physical condition also has an effect of course, regardless of your age. Some aspects of your physical condition you cannot control, others you can. Make sure you read our lifestyle tips.
The main factors that can affect your chances of success have been listed below.
Are you a woman, and:
  • if your ovary contains few eggs, this can have a negative effect on your chances of success (regardless of your age);
  • if you have a blocked fallopian tube filled with fluid (hydrosalpinx), your chances of success are halved;
  • if you smoke every day, your chances of success are also almost halved;
  • if you are overweight, i.e. a BMI in excess of 25 (kg/m²), you lower your chances of success by almost one third;

If you are a man, the quality of your sperm also determines whether you are able to father a child.
However in practice for IVF/ICSI, this factor only affects men with a problem in their sperm production, for whom the semen for the treatment was obtained through surgery (TESE).