In ART, which description best defines assisted hatching?

In ART, which description best defines assisted hatching?

• A. A procedure in which the zona pellucida is thinned or perforated to assist hatching
• B. Embryo biopsy for genetic testing
• C. Embryo cryopreservation
• D. Fertilization by ICSI

Answer: (D)

Assisted hatching focuses on helping the embryo break out of its protective shell, the zona pellucida, so it can hatch and implant. In IVF, the embryo must hatch from this zona to attach to the uterine lining. This is achieved by thinning the zona or creating a tiny opening using methods like laser, chemical treatment, or gentle mechanical technique. The goal is to reduce the barrier to hatching and improve the chance of implantation, especially in cases where the zona is thickened, or after freezing and thawing, or in patients with factors that raise implantation risk. The other options involve different ART steps: embryo biopsy for genetic testing, cryopreservation of embryos, and fertilization by ICSI, none of which describe the hatching process.

Assisted hatching focuses on helping the embryo break out of its protective shell, the zona pellucida, so it can hatch and implant. In IVF, the embryo must hatch from this zona to attach to the uterine lining. This is achieved by thinning the zona or creating a tiny opening using methods like laser, chemical treatment, or gentle mechanical technique. The goal is to reduce the barrier to hatching and improve the chance of implantation, especially in cases where the zona is thickened, or after freezing and thawing, or in patients with factors that raise implantation risk. The other options involve different ART steps: embryo biopsy for genetic testing, cryopreservation of embryos, and fertilization by ICSI, none of which describe the hatching process.