How is infertility caused by drugs or chemicals treated?
Some drugs can leave men permanently sterile and there are no treatment options available to restore sperm production. Other drugs only have a temporary effect on sperm production. Once these drugs are stopped, sperm production should return. However, because of the long time it takes for sperm to develop, it may take between six and 12 months for sperm counts to reach normal levels. To avoid pregnancy problems and possible foetal abnormalities, doctors sometimes recommend that couples wait for six to 12 months before trying to become pregnant after certain drugs have been taken.