AH is a technique we use to potentially increase implantation rates. AH occurs after you have already made embryos through IVF or ICSI. It is not associated in any way, with fertilization or fertilization rates.

As part of IUI, IVF or ICSI, we may decide to create a small opening in the outer layer (zona pellucida) of a fertilized egg (embryo) before it is inserted into the womb. This opening allows the embryo to become more 'sticky' and helps it emerge from its shell more easily as it continues to divide, so it will successfully attach to your uterus.

Some patients have a thick zona pellucida but more commonly we find a zona with normal thickness that is very difficult to 'hatch'. However, one cannot determine if AH is of benefit until it is performed on the embryo.

AH is usually used for women 38 or older, women with an elevated FSH, patients with previously failed IVF without AH, unexplained infertility, or thick zona pellucida identified during IVF.