The fusion of an egg cell with a sperm cell is a critical step of the IVF fertilization treatment. Contrary to natural fertilization this step occurs in a small container rather than in the body of the woman.
IMPORTANT: It can occur that both in IVF treatment method as well as with an ICSI method only few egg cells are fertilized.
Following the traditional IVF – method
- A so-called “rescue ICSI” on the day after the egg cell removal is attempted. After it has been determined on the first day that no sperm cell was able to independently fertilize an egg cell an attempt will be made to embed a sperm cell inside an egg cell using the ICSI method. However, the chances for success are reduced as the egg cell is already one day old.
- Use of the ICSI method during the next treatment cycle is recommended.
Following the ICSI – method
- Use of IMSI procedure, Intracytoplasmic Morphologically Selected Sperm Injection, in the next treatment cycle.
- Use of PICSI procedure in the next treatment cycle.
- Activation of the egg cells with Calcium Ionophore (CULT-active) during the next treatment cycle.