The hospital faces a bed block crisis and Kristina's twins need delivering fast or she'll have to move to another hospital. Amy and Dave are expecting their first child together.
Sarah's expecting twins. She and her mum Pat are both midwives and have to overcome their professional concerns to concentrate on the babies' safe arrival.
'Tattooed lady' Sazzie and 'scary biker' Adam are having their first baby. So are Jen, who has Crohn's disease, and ex-soldier John. Meanwhile, Jeannie is having her fourth and final baby.
Emma and James lost a combined 11 stone so they could start a family. Erika and Jez are on baby number two, after the struggle to conceive number one became an exhausting regime.
Sarah and her mum Pat are both midwives at Liverpool Women's Hospital, and now Sarah's expecting twins. Tasha previously had a traumatic birth and is now having her second child.
Louise is having her first child at 45, but has gone through a heart-breaking split with her baby's father, Dan. Meanwhile, Jess is 16 and is finally getting a sibling.
Musicians Lucy and James are putting rehearsals on hold to have a baby. Laura and Mike fell in love in hospital when Laura was dangerously ill. They're expecting their second son.