This happens during an artificial insemination with the ICSI method
ICSI is a single sperm injection directly into the egg. This method of artificial insemination is especially useful for a severely limited sperm quality of the man. Learn more about the process and the opportunities.
Intracytoplasmic sperm injection, or ICSI for short, is a special form of artificial fertilization outside the body, ie in vitro fertilization (IVF).
Pretreatment up to and including egg cell retrieval is no different from IVF therapy. First, egg maturation is stimulated by hormone treatment. If the ovarian follicles in which the oocytes mature reach a certain size, the fertilizable oocytes are removed from the ovary. On the same day, the ICSI method injects a single sperm into the cytoplasm of a mature egg using a thin glass capillary tube. This method, which has been used successfully since 1992, is called microinjection.
The injected oocytes are placed in the incubator immediately after microinjection. The day after the ICSI you can see how many of the treated oocytes are fertilized (pronuclear stage). The further development to embryos also takes place in the incubator and lasts for a maximum of five days. This is followed by the insertion of the embryos into the uterus.
There are several reasons why ICSI treatment is better for couples than IVF therapy. For example, there may be a severely limited sperm quality of the male. Although IVF therapy did not result in egg fertilization (IVF failure), ICSI is a good way to achieve pregnancy.
The chances of success of an ICSI treatment essentially depend on the age of the woman. They are at the age of 30 years at about 40 percent and at the age of 35 to 38 years at about 30 to 35 percent. This means that about every third treatment cycle leads to a pregnancy.
ICSI therapy carries about the same risks as IVF treatment. For example, the previous hormone treatment may cause abdominal pain, nausea or respiratory distress. In addition, anesthesia is never completely risk-free, and it can be inadvertently injured organs when removing the egg cells. What also needs to be considered: Because in most cases more than one embryo is inserted into the woman's uterus during embryo transfer, multiple pregnancies are more common.