There are many stories in the Bible about infertility here is one of them

~Abraham and Sarah had given up hope of ever having their own children when God gave Abraham the promise that he and Sarah would have a son whose offspring would be greater than the stars in the sky. Sarah laughed at the promise of God since she was well past the child-bearing years, but God fulfilled his promise with the birth of Isaac. (You can read more about the story in Genesis 16-21.)