How does fertilization occur?
- This stage is performed in the embryological laboratory.
- In the procedure can be used both fresh oocytes and sperm, and cryopreserved, which are thawed 1-1.5 hours before fertilization.
- Pre-prepared spermatozoa are added to the eggs in a special environment and left for several hours for independent fertilization.
- If there are specific indications, for example, with a significant decrease in sperm motility, the embryologist injects the best sperm into the egg (ICSI) with a thin needle under a microscope.
- In 16-18 hours after fertilization, the fact of egg fertilization is assessed.
How are embryos grown?
- Fertilized eggs are placed in an environment identical to those in the fallopian tubes, and transferred to an incubator, where embryos are cultured for up to 5-6 days.
- The embryologist evaluates the development of embryos on the next day, 3 and 5 days after fertilization.
- Prior to transfer, each embryo is assigned a quality category depending on their development by a specific day.
- Embryos of categories AA and BB are considered the best for transfer.
- Technical capabilities of the Reproductive Health Center “Bina” allow embryos to be cultured for up to 5-6 days, when the chances of pregnancy are maximum.
