Laser Hatching

Laser Hatching

Couples may face difficulty and frustration after IVF and ICSI treatments due to failure of successful implantation of healthy looking embryos into the womb. In general, the embryos are transferred back into the womb on the second or third day, when they are in the 4 cell or 8 cell stage. Once they are placed back into the womb, they keep on growing till day 5 (5 days after oocyte retrieval). At this time the embryos are multicellular and differentiated into an inner cell mass and an outer cover called the Trophectoderm. This embryo is called a Blastocyst. The Blastocyst starts expanding and cracks open the cover of the zona, and escapes out. This process is known as 'Hatching'.

In Assisted Hatching, a cut is given to the zona of embryos of 4 cell or 6-8 cell stage. By laser hatching the zona of embryo gets weakened which further help them for hatching process and then they are transferred to the women womb.

The cut can be made in three different ways:

1. Mechanical Hatching:
In this the embryo cover is slit open mechanically with the help of a thin long drawn out glass needle. This is done with the help of a machine called the Micromanipulator.

2. Chemical Hatching:
In this the zona is opened by touching it with a chemical called Acid Tyrode Solution. This is also done with the aid of the Micromanipulator.

3. Laser Hatching:
This is the latest method, introduced in the world in 1992. At present the Laser beam is generated by an InGaSp Diode Laser. The zona is cut with the Laser beam by simply pressing a button on the Laser machine. Many babies have been born all over the world, following the introduction of this technique.


  • Women patients usually between 35–38 years of age
  • Patients in whom the zona thickness is more than 15 microns
  • Patients who have had more than one attempt at IVF/ICSI and have failed to become pregnant
  • Patients who have their extra embryos frozen. The frozen thawed embryos are hatched before embryo transfer
  • Patients who are undergoing Pre–Implantation Genetic Diagnosis

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