A variation of IVF, developed in 1990's, Intracytoplasmic Sperm Injection is a treatment whereby the ovaries are stimulated to produce several eggs. However, instead of simply mixing the sperm and the eggs together, an embryologist will y inject a sperm into each egg using a special microscope. This technique has allowed many couples the opportunity of having a family that conventional IVF wouldn't have. ICSI is recommended for couples when the sperm count is particularly low, has poor structure or with low motility. It is also used in some cases where conventional IVF has shown a very low fertilisation rate.