ICSI is part of the whole IVF (In Vitro Fertilization) process. During a normal menstrual cycle, only 1 egg is usually recruited to mature in a capsule of fluid called a follicle.
Assisted hatching (AH) involves microdissection of the zona pellucida (shell), prior to embryo transfer, in order to facilitate the hatching of the embryo from its protective envelope and thereby improve the odds of uterine implantation.