The blastocyst is held with gentle suction while a tiny needle delivers an acid solution that wears away an area of the outer shell (the zona pellucida). This helps the embryo "hatch" out of the shell and implant in the uterine wall. Shortly after the procedure, the embryo is transferred to the uterus. Assisted hatching is often recommended for couples who have had unsuccessful IVF cycles or where the female partner is over 37 or has high FSH levels, poor quality embryos or embryos with thick shells.
For more information on Assisted Hatching (AH), click here.