By Rachel Graham of RNZ When Rebecca Fitzgerald's twin boys were born three months premature she endured a heart-breaking separation from her tiny babies. Her son Louie needed treatment at Christchurch Hospital's Neonatal Intensive Care Unit (NICU) but there was no room for Ollie, who had to be treated in Dunedin, where they were born. Fitzgerald had to travel between the cities to visit her boys for seven months but now there is hope a $14 million expansion of Christchurch's NICU will result in fewer parents missing out on precious time with their sick newborns. About 18 to 19 weeks into her pregnancy Fitzgerald was told that her twins were sharing a placenta and one of the boys was getting most of the benefit. Weeks later an obstetrician at Dunedin Hospital's emergency department delivered some alarming news. "I'll never forget the look on her face. She looked me dead in the eye and said I'm really sorry but you're going into labour. The boys were 23 weeks and two days.…