A new group of hopefuls start their families with IVF. A list of issues gives Emily & John a tiny chance of success, while it's a mystery why Maddie & Nathan can't fall pregnant.

For Sheila and Tyson - in their late forties - time is running out. Donor eggs give them one last shot at a baby.

Will donor eggs produce a pregnancy for 46 year old Sheila, or is this the end of her and Tyson's dream to have a baby? Emily and John's baby arrives, but things take a turn.

For single mum Sarah, will the one round of treatment she can afford be enough? Christie & Perrie are desperate to find an underlying cause of their infertility.