The first episode focuses on preparations for birth and the shock of the arrival of a new baby. Sam and Rob from Machen are expecting triplets and are stocking up with hundreds of nappies, wipes and other supplies. Most triplets are delivered premature, and theirs will be no exception. In Burry Port, Cathy and Andrew are counting on being among the three per cent of parents who have a homebirth. Kelle and Ali from Cardiff have a very lively household: two dogs and a cheeky four-year-old daughter Ayla. And Kathryn and Richard from Ammanford are a couple with a master plan, with all the elements of the pregnancy plotted with military precision.

The second episode follows the parents and babies as they spend time enjoying their 'babymoon' - the first few blissful weeks at home with a baby.

The 'babymoon' period is over, and the mums and dads have to get back to the real world. At the same time, the sleepless nights kick in and parenting becomes a whirl of emotions, hormones and constant demands. The programme meets single mother Emily from Brynmawr, who has breezed through the first few weeks of parenting. Her friends and family are full of praise for the job she's doing, but Emily is still nervous of being judged by other mums, and has not yet ventured far from home.

In the final episode, the parents hit their stride but discover an important truth - once you have children you never stop worrying! Some of those worries - like vaccinations - are common to all of the families, while other mums and dads have their own particular fears which keep them awake at night. For Tristan and Katie, it's the news that one of their twins, baby Louis, has Down's Syndrome, but they are determined to make sure he has just the same fulfilling life as his little sister Roxie.