What is intracytoplasmic sperm injection (ICSI)?
Intracytoplasmic sperm injection (ICSI) is a form of IVF treatment that involves injecting a single sperm into each egg using very fine micromanipulation equipment.
As the human egg is one-tenth of a millimetre in diameter and the sperm 100 times smaller this is a very delicate procedure performed by highly skilled embryologists using a sophisticated microscope.