Assisted hatching is a micromanipulation technique influencing the success of infertility treatment. The embryo develops to a certain size under a hard shell. If pregnancy is to occur, the embryo must leave this covering (zona pellucida) after being transferred to the uterus and nestle in the endometrium.
In some women, embryo implantation may fail due to a too firm or thick zona pellucida. Using a micropipette, the envelope is gently cut and the path for the embryo is cleared. During assisted hatching, the embryo cannot be damaged.
The embryologist decides whether this method will be used, based on the assessment of the development of the embryo and the consent of the treated couple.