Chances of success

Intra-uterine insemination

For hormonal treatments with insemination using the partner's sperm, the chances of pregnancy are about 15% after one cycle.

Fécondation in vitro (copie 1)

Since 1st September 2017, the date on which the changes to the Reproductive Medicine Act (RMA) came into force, the culture of blastocysts (embryos at the 5th or 6th day of development) has been our preferred method. 

Thanks to natural selection of embryos and the identification of embryos with the greatest potential for development, the chances of pregnancy and giving birth per transfer cycle have increased. Women may then conceive faster by reducing the number of transfer cycles.

The success rate of an IVF cycle depends on several factors. The patient's age and the causes of infertility are the principle ones. Other elements, such as genetic factors, the quality of the sperm and of the collected egg cells, and the quality and number of fertilised egg cells can affect the success of the treatment.

Clinical pregnancy rate per embryo transfer cycle (%)

Clinical pregnancy rate per embryo transfer cycle (%)

The chances of becoming pregnant and having a child after IVF/ICSI treatment in the Fertility Medicine unit at CHUV are shown in the graph below in relation to the woman's age.

Woman's ageFees transfertTransfers after thawing


How to understand these data

Currently, post-thaw pregnancy rates are currently the same or better after fresh transfer. Indeed, in the event of a strong response during stimulation (favorable prognosis factor) or an increase in progesterone at the time of onset, we opt for the freezing of all the embryos for a transfer in the thawing cycle during the month following.

This strategy avoids ovarian hyperstimulation syndrome in the majority of cases.

The pregnancy rate (positive pregnancy test) is not identical to the birth rate because sometimes the pregnancies are not progressive and stop spontaneously. The rate of early miscarriage is also related to woman's age.

Our team stay naturally at your disposal to discuss these results and your chances.


Fertility Medicine and Gynaecological Endocrinology
CHUV Maternity Unit
Av. Pierre-Decker 2
1011 Lausanne
Tél. +41 21 314 32 76
Fax +41 21 314 32 74
 Last updated on 08/03/2019 at 10:07