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.