Females taking pain killers while pregnant risk their babies having fertility problems in the future. This applies to their grandchildren as well.
"Scientists at Edinburgh University looked at the effects of paracetamol (also known as acetaminophen, and is available under the trade name Tylenol) and ibuprofen on the testes and ovaries of human fetuses. They found that the medications left permanent marks on DNA, which could affect a future baby's fertility." - Quote by Isabelle Khoo
Story via Huffington Post