Taipei - A Taiwan man, infertile due to cancer, has become the father of twins after the sperm he had frozen 13 years ago, was used to impregnate his wife, a newspaper reported Saturday.

Doctors at the Taipei Medical University's College of Medicine set the local record for the use of the longest-preserved sperm in helping the couple have children, the China Times reported.

The man, identified only as Chen, was 23 and a university student in 1995 when he contracted testicular cancer. Fearing chemotherapy would make him infertile, he stored nine tubes of sperm in a sperm bank.

Chen asked the doctors to artificially inseminate his wife after the couple married earlier this year. She gave birth to twin boys in October. (dpa)