Laser Assisted Hatching (LAH)
A lab technique used in IVF to support implantation in selected cases.
Purpose
Laser Assisted Hatching is an IVF lab technique that helps the embryo “hatch” from its outer shell (zona pellucida), which is a step needed before implantation. It is not required for everyone—your specialist recommends it only when it is likely to help.
Improve implantation in IVF by creating a small opening in the embryo’s zona pellucida.
Often considered in selected cases based on age, embryo factors, or prior IVF history.- Used as an add-on step before embryo transfer (fresh or frozen).
Procedure
A laser is used to gently thin or create a tiny opening in the embryo shell to support implantation.
Embryo Assessment
The embryology team reviews embryo development and checks if LAH is appropriate for the case.
Laser Step
Laser gently thins or perforates embryo shell (zona pellucida) in a controlled, precise manner.
Continue IVF Plan
The embryo continues in the planned pathway for transfer (fresh transfer or frozen transfer/FET).
Embryo Transfer
The embryo is transferred to the uterus using the standard embryo transfer procedure.
Benefits and Evidence
Benefits
- Recommended for women with previous IVF failures, older age, or poor embryo quality.
- Enhances chance of embryo implantation.
Evidence
- LAH is used in selected IVF cases based on clinical indication and embryology assessment.
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