After surviving testicular cancer, Lance Armstrong never thought he would, or could, conceive a baby naturally.

That is – until his girlfriend Anna Hansen. Lance Armstrong has four other children. What makes this pregnancy and birth so amazing is the fact that chemotherapy and radiation therapy, especially aimed at testicular cancer, normally kills all sperm cells and reproductive ability. In the case of Lance Armstrong, the body rejuvenated and sperm production resumed. Baby Olivia Marie Armstrong is a true medical miracle.

Lance Armstrong, known as a professional Tour de France cyclist, has been in and out of the news in the past few years. After a breaking off an engagement with rock star Cheryl Crow, he dated here and there for a while until he met current girlfriend Anna Hansen. The couple conceived their first child naturally, after Armstrong’s treatment for testicular cancer. This is the second child the couple has together.