The ova which was won through the follicle puncture are put in nutrient liquid and kept in a incubator which will then after approx. three hours be brought together with the sperms of the partner. Depending on the quality of the seminal liquid, i.e. the concentration, mobility and shape of sperms, two kinds of artificial insemination of the ova will be used:

Eizelle mit Spermien

Oocyte inseminated with sperm



Conventional IVF

With the conventional IVF the seminal quality of the man is normal or only weakly limited. Die Hereby, the spermatozoa can penetrate from alone into the ovum and fertilise them. Technology: The seminal liquid of the man is processed.A highly movable suspension of sperms is obtained. This suspension is given in a certain concentration to the ova, which are cultured in a nutrient liquid. There they remain overnight, after 18 hours theconception can be controlled.




The ICSI (Intra Cytoplasmic Sperm Injection) must be applied, if the seminal quality of the man is clearly limited. This can mean that the amount, the motility or the number of normal shaped spermatozoa is strongly reduced. Then the sperms cannot penetrate into an ovum by itself. Technology: The spermatozoa are sucked under the microscope into a tiny glass needle and then injected into the ovum. The ovum is held with a slightly bigger, but still tiny glass capillary. For a better imagination: the diameter of an ovum is about a tenth of a millimetre, comparable with the diameter of a human hair. Therefore the ovum is the biggest cell in the human body. The sperm counts to the smallest cells.










These terms are the abbreviations which refer to the origin of sperms. In both cases no sperms exist in the seminal liquid of the man, therefore from sides of urologists or andrologist a small surgical operation is done in which sperms are won from the testicle tissue (testicular sperm extraction, TESE) or the epididymis (Micro-Epididymale-Sperms-Aspiration). These are usually frozen and are able to be used with a normal ICSI treatment.





Further to