In our clinic, under the direction of Dr. Zuzana Holubcova, a study was conducted to verify the association between the presence of the spindle and the success of development after fertilization by ICSI. In this study it was confirmed that the chance of successful embryonic development is more than three times higher in fully mature eggs compared to those that are fertilized prematurely. Evidence of the benefits of this approach includes healthy babies born even from eggs that were delayed in development and at risk of premature fertilisation.
In order for an egg to be successfully fertilized, it must be mature. The maturity of the egg is routinely evaluated by an embryologist in a light microscope during ectopic fertilization. The embryologist checks whether the egg has already expelled the so-called zona pellucida (a small formation in the perivitelline space).
However, the mere presence of the zona pellucida does not necessarily mean that the egg has completed its development. Only the presence of the so-called dividing spindle, which is responsible for the even distribution of genetic material after fertilisation, is a sign of true maturity. Thus, an egg may sometimes appear mature to the embryologist at first sight, but after the sperm has been injected into the egg, the egg does not develop successfully because the fertilisation was carried out prematurely.
Who is the polarizing microscopy method for?
Polarizing microscopy examination is performed when indicated by a physician or embryologist for patients who have an unexpectedly low number of mature eggs in response to treatment or whose eggs have not fertilized during previous treatment for unknown reasons.
And how does the examination work?
If the embryologist finds that the egg is not yet mature, he or she will allow the egg to be cultured for several hours. This increases the chances that the egg will complete its development before fertilisation.
Other treatment options
IVF with your own eggs
Infertility afflicts a large number of couples. We know how to help.
IVF with donated eggs
We have specialized in treatment with donated eggs since the clinic was founded. Thanks to our extensive database of donors, we can choose the most suitable one for you.
IVF with donated embryos
Thanks to our sophisticated egg donation program, we have the unique opportunity to offer infertile couples treatment with donated embryos.
The first step to parenting from the comfort of home
Our doctors are also here for you online. We provide free consultations, we will make an appointment without waiting and without the need to present a request form.