CPT® Code 89253

1. Indications

Assisted embryo hatching is indicated for several specific conditions and patient characteristics that may affect the success of embryo implantation. The following are the primary indications for this procedure:

• Age Women aged 38 or over often have a more rigid zona pellucida, which can impede successful implantation.
• Poor Egg Quantity and Quality Patients with a reduced number of eggs or eggs of suboptimal quality may benefit from this procedure to enhance implantation chances.
• Poor Embryo Quality This includes embryos that exhibit excessive fragmentation or slow rates of cell division, which can negatively impact their viability and implantation potential.
• Identification of Thick Zona Pellucida A thick zona pellucida can hinder the embryo's ability to hatch and implant effectively, making assisted hatching a viable option.
• Previous In Vitro Fertilization Failures Patients who have experienced unsuccessful IVF attempts may be considered for assisted embryo hatching to improve their chances of a successful pregnancy.

2. Procedure

The procedure for assisted embryo hatching involves several critical steps that are performed with precision to ensure the best possible outcome for embryo implantation. The following outlines the procedural steps:

• Step 1: Embryo Preparation The embryo is first placed under a microscope to allow for careful observation and manipulation. This step is crucial as it ensures that the embryologist can accurately assess the embryo's condition and prepare it for the hatching process.
• Step 2: Stabilization A specialized holding pipette is used to hold the embryo stationary during the procedure. This stabilization is essential to prevent any movement that could disrupt the delicate process of assisted hatching.
• Step 3: Application of Acidic Solution A very small hollow needle is then positioned against the zona pellucida of the embryo. An acidic solution is expelled through this needle, which serves to digest a portion of the zona pellucida. This step is critical as it creates a small hole in the outer shell of the embryo, facilitating the hatching process.
• Step 4: Washing the Embryo After the acidic solution has been applied and the zona pellucida has been partially digested, the embryo is carefully washed to remove any residual solution. This washing step is important to ensure the embryo is in optimal condition for the next phase of treatment.
• Step 5: Return to Culture Medium Finally, the embryo is returned to the culture medium where it will remain until the embryo transfer procedure is performed. This ensures that the embryo is kept in a suitable environment for continued development.

3. Post-Procedure

Post-procedure care for assisted embryo hatching involves monitoring the embryo's development and preparing for the subsequent embryo transfer. After the procedure, the embryo is kept in a controlled culture medium to support its growth until it is ready to be transferred into the uterine lining. It is essential to follow up with the patient to assess the embryo's viability and to discuss the timing of the embryo transfer. Additionally, patients may be advised on any specific care instructions or lifestyle modifications to enhance the chances of successful implantation following the transfer.