Frozen Embryo Transfer With Laser Assisted Hatching

Frozen Embryo Transfer and Laser Assisted Hatching: What are They?

Before understanding Frozen Embryo Transfer with Laser Assisted Hatching, it is vital to understand Frozen Embryo Transfer and Laser Assisted Hatching, as they are distinct concepts that are often discussed together.

Frozen Embryo Transfer

Frozen Embryo Transfer (FET) involves freezing the embryo before transferring it to the uterus in a subsequent cycle. It is beneficial because it allows the uterus to relax and recover from stimulation, which may create a more receptive endometrium. Plus, it reduces the risk of OHSS while giving the patient the flexibility to choose the timing at their convenience.

With advantages, there are a few disadvantages that patients should remain aware of, such as -

• The procedure might take longer to complete, depending on the quality of the embryo.
• There are minor risks involved of damaging the embryo during freezing or thawing

Laser Assisted Hatching

Laser Assisted Hatching (LAH) is done to help the embryo hatch from its outer shell, known as the zona pellucida. This is important for the implantation process. This is mostly done if the embryo’s shell is hardened, which is most common in older women or frozen embryos.

It is also done if the embryo quality is not optimal or if there have been several IVF failures in the past. The procedure involves creating a small opening in the shell of the embryo so that it hatches properly, which may help the embryo attach to the lining of the uterus successfully.

What is Frozen Embryo Transfer with Laser-Assisted Hatching?

Frozen Embryo Transfer with Laser Assisted Hatching involves creating a small opening on the outer shell of the embryo. This allows the embryo to attach to the lining of the uterus well and increases the chance of implantation.

This procedure is particularly helpful when repeated freezing and thawing harden the zona pellucida of the embryo. This hardened shell makes it difficult for the embryo to hatch properly.

As per recent research and studies, it can be said that LAH with FET works better and improves the chance of implantation, especially in older women and in individuals with multiple failed IVFs. The procedure is beneficial for both frozen and fresh embryos, but it often shows good results in frozen embryos. It is quick and is done under a microscope in a controlled environment.

Who Should Opt for Assisted Laser Hatching?

Assisted laser hatching is not for everyone and is mostly recommended for people who-

• Are over 35 years old
• Have had repeated IVF procedures, but never succeeded
• Have embryos with a thicker zona pellucida
• Has poor embryo quality
• Has high serum basal (FSH) levels

The procedure is also recommended when transferring thawed embryos, as vitrification may cause the shell to harden. Also, in some cases with high fragmentation, laser-assisted techniques may help embryo handling.

What are the Benefits of Assisted Laser Hatching for Frozen Embryo Transfer?

As mentioned above, Laser Assisted Hatching, along with FET, can increase the chance of getting pregnant. The embryo attaches to the lining more effectively, as the laser-made holes make it easier to come out of the shell. This is additional support for the embryo, which is helpful for couples undergoing IVF. Also, the process is considered safe as it is designed to minimise damage to the embryo.

Other benefits are -

• Process is completed within a time frame of 0.8 milliseconds
• Compared to other hatching methods, this LAH is far safer and better
• Helps in high accuracy and reduces the chance of manual errors
• Reduces the risk of complications and the birth of identical twins

What are the Methods Used in Laser-Assisted Hatching?

The end goal of the procedure is to ensure the embryo implants effectively and efficiently by creating a hole in the embryo that allows it to hatch without struggle. It is then paired with FET for a successful pregnancy.

Preparation

The embryologist prepares the uterus for implantation. Depending on what treatment plan is opted for, the patient may undergo a natural cycle or receive hormonal medication, such as estrogen and progesterone. This helps thicken and stabilise the endometrial lining. Doctors also use blood tests and ultrasound scans to confirm if the lining is prepared for the embryo transfer.

Frozen Embryo Extraction

If the uterus is prepared, the frozen embryo is removed from the cryostorage and thawed in the lab. Before anything, the embryologist confirms if the embryo has survived the thawing process or is it still developing. Usually, the FET involves blastocysts, which are embryos developed for five to six days before freezing.

Laser Assisted Hatching Procedure

Laser-assisted hatching is then performed in a lab using a micromanipulation microscope. It has a highly focused infrared laser that helps either create a tiny opening or thin a small portion of the zona pellucida. Usually, multiple embryos (The number of embryos undergoing hatching depends on the number available and the treatment plan) undergo the process to help identify the most suitable embryo for transfer.

The laser is placed away from the embryo's cell to avoid damaging it. It is a short process which usually takes a few seconds. Once done, the embryo is immediately transferred to a controlled incubator environment.

Embryo Transfer

Then, the embryo transfer process is simple and does not require anesthesia. A thin catheter containing the embryo is passed through the cervix into the uterus. This is done under ultrasound guidance. Once inside, the embryo is released into the uterine cavity. After the transfer, the healthcare provider provides progesterone support to help maintain an optimal uterine lining during implantation.

Note: The decision for LAH is based on the patient's health, IVF history, maternal age, and embryo quality.

How Successful is Frozen Embryo Transfer with Laser Assisted Hatching?

Women over 37 years of age experience decreased implantation rate due to failure of the zona pellucida. The live birth rate for women not using LAH is around 28%. However, couples who opt for LAH along with FET have a live birth rate anywhere between 27-34%.

What are Possible Risks and Complications?

Although Laser Assisted Hatching is generally considered safe, it might contain certain risks and limitations during a Frozen Embryo Transfer.

Damage to the Embryo

The procedure uses a focused infrared laser to create a small opening in the outer shell of the embryo. It is important to keep the laser at a certain distance, as it may potentially injure the embryo, thus reducing its viability. But modern labs are now equipped with controlled equipment and specialists who use precise lasers to minimise the risk.

Monozygotic (Identical Twinning)

Another concern is the possibility of identical twinning. Some studies suggest that assisted laser hatching may increase the likelihood of a single embryo splitting into identical twins. As twin pregnancies are usually associated with a higher risk for both mother and fetus, this raises concerns among many couples. However, the overall incidence remains relatively low.

Uncertain Effectiveness

There are some cases where LAH may not work, and not all studies show improved pregnancy or live birth rates. Hence, many specialists do not recommend this for every IVF patient.

In addition to all these, it is also said that manipulation of the embryo may theoretically affect normal development. However, there is no current evidence to prove that. No matter what, IVF specialists in India ensure to carry on cautiously, as embryos are extremely delicate. Plus, there is a financial consideration: LAH is often offered as an “add-on” to IVF. This means the overall treatment cost may increase without guaranteeing solid outcomes for all patients.

What is the Cost for Frozen Embryo Transfer with Laser Assisted Hatching?

The cost of Laser Assisted Hatching for FET costs around Rs 15,000 to Rs 30,000. Though it is considered an advanced procedure, the cost is quite affordable. Plus, it ensures successful ART by increasing implantation and pregnancy rates, with healthy birth outcomes.

There are several hospitals in India that offer affordable procedures, and for those who are unable to afford them, they offer an EMI or financing option so they have a chance to start a family.

What are the Recommendations for Laser-Assisted Hatching in IVF?

• First and foremost, this is not for all patients undergoing IVF.
• Next comes patient selection:
• The best candidates are individuals with recurrent implantation failure or advanced maternal age
• It is not recommended for young patients with a good prognosis.
• Third, clinics must adhere to the standardised protocols and procedures. This minimises any risk and inconsistencies, while offering an optimal result.
• Patients must be informed properly about the risks, benefits, and uncertainties before the procedure.

Conclusion

Frozen Embryo Transfer is done with Laser Assisted Hatching, especially when the outer shell of the embryo is hardened due to repeated freezing and thawing. When the shell hardens, it prevents the embryo from hatching as it should. Thus, causing trouble during implantation. Laser Assisted Hatching uses a focused, precise laser beam to create holes in the zona pellucida, helping the embryo hatch without struggle.

This procedure is a hope for anyone who is above 35 and has had repeated IVF failures. It may improve reproductive outcomes for selected patients. Doctors and IVF specialists perform the procedure at the clinic, but the hole is made long before the embryo transfer.

Assisted hatching using a laser beam can help the embryo implant in the uterus, which can improve the chance of a successful IVF. Get in touch with the nearest IVF hospital in India to understand the scope, risks, and other associated information