For Sheila and Tyson - in their late forties - time is running out. Donor eggs give them one last shot at a baby. Rachel and Heather are haunted by a tragic loss, but no less determined to start their family. Will it be a miracle result for Maddie and Nathan, or the end of the road?

For single mum Sarah, will the one round of treatment she can afford be enough? Christie and Perrie are desperate to find an underlying cause of their infertility, while Rachel and Heather confront their PTSD in the final stages of Rachel's pregnancy.