Being unable to control her labour heightens 24-year-old first-time mum Natasha's anxiety. Natasha's partner Andrew is the rock that stands between her and a condition that has driven her to the brink in the past. The struggle to conceive their first baby took control of 33-year-old Erika and 44-year-old Jez's sex life, and became an exhausting regime for Jez. They're now on baby number two, and Erika has learned that, when it comes to childbirth, not everything goes to plan. Emma, who's 29, and James, who's 36, lost control of their shared passion for food when they first met, and their weight ballooned. After Emma was given the all-clear from a cervical cancer diagnosis, the couple decided to give themselves the best chance possible of starting a family by losing 11 stone between them.

Sarah, who's 32, and Stephen, who's 37, had the shock of their lives when they found out they were expecting twins. Sarah and her mum Pat are both midwives at Liverpool Women's Hospital and know only too well what can go wrong, but they have to let go of their fears to concentrate on the twins' safe arrival. Holly, who's 19, and 20-year-old Nick surprised Holly's mum Michelle, who's 41, by announcing their planned pregnancy. Michelle struggles to let go of the idea of Holly being her little girl as Holly becomes a mother herself. And Tasha, who's 27, and Jonny, who's 31, went through a traumatic birth with their first child, Nevaeh. As they come in to have their second and last child, a planned C section enables them to banish their fears of history repeating itself.