Approximately one in every four couples who suffer from infertility will have a male factor as the principal cause of their problem and a further one in four will have a male factor as a contributing factor in the presence of female factors also. The introduction of ICSI in the early 1990’s revolutionised the treatment of male infertility and has offered men with sperm disorders a real opportunity of fathering children.
The effects of age on male fertility are not as profound as those in the female. However studies have shown that semen quantity peaks between the ages of 30 and 35, while overall semen quantity has been found to be lowest after age 55.
Researchers have also discovered that genetic defects in the sperm may increase with age in men, possibly leading to decreased fertility, increased chance of miscarriage and increased risk of some birth defects. More research is required in this area.