Now the sheer joy for the woman who discovered she was having a baby against all the odds.
Sarah Gaffney-Lang had had to have brain surgery after she suffered a huge seizure in her sleep.
She was warned by doctors that treatment would likely leave her infertile.
But then something incredible happened. Our reporter Mel Barham has been to meet her.
Sarah has been supported by the charity Trekstock who help young people in their 20s and 30s who are affected by cancer. She has also started writing a blog 'Upper Story Club' about her journey through treatment and beyond.