Most people are familiar with the fact that most couples who reach the point in an ART cycle when embryos are transferred to the uterus, will not achieve a pregnancy. Even when presumably high quality, fertile eggs are used, such as in egg donation, over half of couples are still left disappointed each cycle.
After a fertilized egg is transferred to the uterus, several things must happen:
- ✔ The embryo must break out of the zona pellucida (usually just called the zona) which is a hard protein shell that surrounds it.
- ✔ The embryo must then burrow into the lining of the uterus (called the endometrium) and continue to grow there.
With the help of Laser beam, a small hole in made in zona pellucida helping the embryo to hatch.